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Meaning & Nature of Jurisdiction in the Context of Criminal Law Practice


The jurisdiction of a criminal court is the authority which it has to try a criminal matter. The limits on this jurisdiction are imposed by law, such as statutes, charters, laws, Acts, etc.

The jurisdiction of a criminal court is determined by the offence committed; offender involved and the punishment involved. These three matters constitute the substantive jurisdiction of a criminal court.

Again, criminal jurisdiction of a criminal court may be territorial depending geographical location where the ingredients of the offence manifested. Indeed, the law is firmly settled, that where the initial elements of an offence occur in one state and other elements of the offence occur in another state, both states would have jurisdiction to try the offence. This of course applies to state offences and state courts, because the Federal High Court has nationwide jurisdiction.

Please Note that jurisdiction in a criminal matter is determined by the State or Judicial Division or Magisterial District where the ingredients of the offence occur.

Lastly, criminal courts are usually classified as courts of “General” or “Special” criminal jurisdiction. The former is further classified as “Original” or “Appellate”, depending on the court concerned. The classification is determined by the class of offender and offences that can be tried in a particular court. Thus, courts of special criminal jurisdiction are set up to try particular types of offences or particular classes of offenders; while courts of General Criminal Jurisdiction, are courts that have jurisdiction over different classes of offenders and in respect of different types of offences.

For the purpose of criminal litigation, the Federal High Court is a court of special criminal jurisdiction when it tries a criminal matter. Also, a Military Court Marshal, Coroners Court and Juvenile Court are examples of courts of special criminal jurisdiction.

On the other hand, Courts of General Criminal Jurisdiction are subdivided into two:

                     i.        Courts of Original Criminal jurisdiction, and
                   ii.        Courts of Appellate Criminal Jurisdiction.

Courts of original criminal jurisdiction are courts you can commence criminal proceedings at first instance, for example, Customary Courts, Magistrate Courts and High Courts are courts of original criminal jurisdiction.

Let us now examine the jurisdiction of various Courts of Original Criminal jurisdiction in detail.

a.   Customary Courts

All states where the Criminal Procedure Act (CPA) is applicable have customary courts established by state laws. However, Northern states are not forbidden from having customary courts since they could be established by any state that desires it.

In Lagos State, they are classified as Customary Court Grade A and Customary Court Grade B.

The jurisdiction of customary courts in Lagos State to try persons extends to all persons within Lagos state.

On the other hand, the jurisdiction of customary courts in Lagos State to try offences is limited in to the following offences:

a)   Offences against the provisions of an enactment which expressly confers jurisdiction on the court.

b)  Offences against the rules and bye-laws made by a local government Authority or having effect as if so made under the provision of any enactment and in force in the area of jurisdiction of the courts, and

c)   Contempt of court committed in the face of court.

However, certain offences are expressly excluded from the jurisdiction of the customary courts in Lagos state and these are:

a)    Homicide
b)    Treason
c)    Sedition
d)    Rape
e)    Procuration
f)    Defilement of girls
g)    Offences against the enactments relating to official secrets, and
h)    Capital offences other than those mentioned in the foregoing sub-paragraphs.

Lastly, the jurisdiction of customary courts in Lagos State to impose punishment depends on whether it is Customary Court Grade A or year imprisonment and N200 naira fine; while for Customary Court Grade B, it is 6 months imprisonment and N100 fine. Customary Court Grade B. For Customary Court Grade A – it is One (1)

Appeal against the decisions of any of the zero grades of customary courts lies to the Chief Magistrates’ Court and further to the High Court.

b.   Area Courts

Area courts were formerly known as native courts. They are established by Warrants under the hand of the Chief Judge of the state concerned. Area courts are classified into:

(a)        Upper Area Court 
(b)        Area Court Grade I
(c)        Area Court Grade II and
(d)        In some states Area Court Grade III.

The jurisdiction of Area Courts to try persons is as provided in section 15(1) of the Area Court Edict 1967 as follows:

a)           Any person whose both parents were members of any tribe or tribes indigenous to some part of Africa and descendants of any such person.
b)          Any person one of whose parents was a member of any tribe indigenous to any part of Africa.
c)           Any person who consents to be tried by an Area Court.

Moreover, the state Governor may direct that a person otherwise subject to the jurisdiction of an Area Court should not be tried by the Court.

Again, the jurisdiction of an Area Court to try offences is derived from the Warrants under the hand of the Chief Judge establishing them; the Area courts law and the Criminal Procedure Code (for example, section 12(2) of the Criminal Procedure Code).

Hence, apart from homicide offences, Area courts are empowered to exercise jurisdiction in criminal cases in respect of which jurisdiction is expressly conferred on the court either by warrant establishing them or by any other law.
They also have jurisdiction to try Penal Code Offences which are mention in Column 7 of Appendix A to the Criminal Procedure Code (CPC), where the area court is of the same grade or of a higher grade than the Area Court mentioned therein.

The jurisdiction of an area court to impose punishment is as follows:

a)           Upper Area Court:             Unlimited except homicide
b)          Area court Grade I:          5 years imprisonment and N1000
c)           Area Court Grade II:         3 years and N600
d)          Area Court Grade III:       9 months and N100

Note that appeal lies from the decisions of Area Court Grade I, II & III to Upper Area Court in criminal matters an then to State high Court.

Persons who can appeal against the decisions of Area courts are:

(a)        Any aggrieved party or any party aggrieved by a decision or order of any area court and
(b)        Area Court Inspector in his own motion or upon application of any person concerned.

Lastly, since Area Courts are inferior courts of record, formal charges are not required for trials therein under section 387 of the Criminal Procedure Code; but legal practitioners now have a right of audience – see the case of Uzodimma v. COP; where section 390 of the Criminal Procedure Code was declared void.

c.   Magistrates Courts:

A Magistrate Court in Lagos state can only impose a maximum imprisonment of Fourteen (14) years. The jurisdiction of a Magistrate Court to impose punishment is also determined by the sum total of punishment which it can impose when it is trying a person for multiple offences.

Its jurisdiction to try an offence depends on whether the offence is indictable or non-indictable. An indictable offence is any offence which upon conviction may be punishable by a term of imprisonment exceeding 2 years or by a fine exceeding 200 naira, not being on offence defined by the law creating it to be punishable upon summary conviction. On the other hand, a Non-indictable offence is the opposite.

Consent of the prosecutor (if he is a Law Officer) and that of the accused person must be obtained before an accused person can be tried for an indictable offence in a Magistrate Court. Failure to obtain consent renders the trial void at initio. Consent may be obtained at any time before defence.

Lastly, Magistrate Courts, hear criminal Appeals from Customary Courts.

d.   High Court of a State:

A High Court is a Superior Court of record and as such, it is not limited in its jurisdiction to impose punishment. Thus, although a High Court is limited in its jurisdiction to try offence, it is unlimited in its jurisdiction to impose punishment. The jurisdiction of the State High Courts is uniform throughout the Federation except that in the Northern States, appeals in respect of criminal causes and matters emanating from the Upper Area Courts can be entertained by the State High Courts.

Also, a Northern State High Court can impose sentences without trial on cases referred to it from the Magistrate Court for stiffer penalties pursuant to section 257(1)(b) of the Criminal Procedure Code.

A State High Court has jurisdiction to try the following offences:

(a)        All indictable offences contained in an information/charge;
(b)        All non-indictable offence brought by way of complaint;
(c)        Appeals from decisions of Magistrate Courts on Criminal matters.

Take Notice of the following on the issue of CONSECUTIVE SENTENCES – when the court sentences an accused in respect of more than one offence and it orders such offences to run consecutively, the aggregate term (the sum total of all the sentences) shall not exceed twice the limit of the jurisdiction of the Magistrates Court to impose sentences: section 24 of the Criminal Procedure Code (CPC). But, Magistrate Courts’ in the Southern States cannot exceed the limit of their jurisdiction to impose penalties even when they pronounce consecutive sentences.

By consecutive sentence, we mean a convict serving one sentence after the other; while in concurrent sentences, all the sentences run at the same time.

Further note that the Court of Appeal does not have original criminal jurisdiction. The Supreme Court does not also have original criminal jurisdiction.

e.   Juvenile Courts:

Juvenile Courts are established under the Children and Young Persons Laws (CYPL) of the various states. The have jurisdiction to try all offenders who are young persons. Generally, young persons are persons who have attained the age of 14 years but are under the age of 18 years.

All young offenders are subject to trial by juvenile courts except in two instances:

(a)        where the juvenile is charged jointly with an adult; and  
(b)        where the charge is one of homicide.

In both instances above, the trial shall take place in the regular courts. Specifically, in cases of Homicide, the juvenile court can conduct preliminary inquiry but cannot proceed to full trial of the offence if a prima facie case is established. A Juvenile Court cannot impose a term of imprisonment on a young person below Fourteen (14) years of age.

It must be noted that children below the age of 7 years are not criminally liable. Children between the ages of 7 years and 12 years are only criminally liable for criminal acts or omissions if they are found to have the capacity to know that their acts or omissions are wrong in law. However, they are not criminally liable for the offence of rape: State v. Nwabuese. Children above 12 years but below 14 years are responsible for their acts or omissions which constitute an offence, but cannot be sentenced to prison. Also, Young Persons of 14 years but below 18 years of age are criminally responsible for their criminal acts or omissions.

The age of a juvenile can be determined by:

(a)        Adducing direct documentary evidence;
(b)        Oral testimony as to age of the accused person by his parents or relations or
(c)        Medical examination by a medical practitioner in a government medical institution.

The material age for the conviction of a juvenile is the age at the time of commission of the offence: Modupe v. The State.

f.   Courts Marshal:

We have ‘General’ & ‘Special’ Court Marshal. A General Court Marshal is constituted as follows – a) A President (b) Not less than four members (c) a Waiting Member (d) a liason officer (e) a Judge-Advocate. A general court marshal with less than 7 members cannot impose a sentence of death.

A special court marshal is constituted as follows (a) a President (b) Not less than two members (c) a waiting member (d) A Liason Officer and (e) a Judge Advocate.

Note that for the purpose of counting the composition of a court marshal the (a) waiting member (b) Liason Officer and (c) Judge Advocate is not counted.

A Special Court Marshal that consists of only two members cannot impose a sentence of more than 1 year.

The Quorum for a court Marshal is (4) four, excluding the adjuncts.

Furthermore, the Judge Advocate shall be a Commissioned Officer that is qualified to practice as a legal practitioner in Nigeria with at least three (3) post call experience. The duty of the Judge Advocate is to guide and advice the court marshal on the rules of evidence, practice and procedure. He does not have a vote in the decision of the court martial.

The adjectival law regulating the rules of practice and procedure in the courts martial is the Criminal Procedure Act.

A person may not be appointed a member of court-martial unless he is subject to service law and has been an officer in any of the services of the armed forces for a period of note less than 5 years. The President of a Court Marshal shall not be under the rank of a Major or corresponding rank in any of the other services, unless in the opinion of the Convening Officer, a Major or an officer of corresponding rank having suitable qualification is not, with due regard to public services, available provided that the President of a Court-Marshal shall not be under the rank of a Captain or the corresponding ranking in any of the other services.

Note that for the purpose of the constitution of the court-marshal (that is quorum) the waiting member, liason officer and judge advocate should not be counted, they are regarded as adjuncts to the court: Obisi v. Chief of Naval Staff. Also by virtue of section 133 of the Armed Forces Act, an officer cannot be tried by a court-marshal constituted by officer of a lower rank: Okoro v. Nigerian Army Council (2000) 3 NWLR 647.

Persons who may convene a Court-Marshal

According to section 131 of the Armed Forces Act only the appropriate superior authorities may convene a court-marshal. A General Court martial may be convened by the following appropriate superior authorities (a) The President (b) the Chief of Defence Staff (c) the Service Chiefs (d) A General Officer Commanding or corresponding command or (e) A Brigade Commander or corresponding command.

On the other hand, a special court martial may be convened by the following appropriate superior authorities (a) a person who may convene a General-Court-marshal as listed above or (b) the commanding officer of a battalion or of a corresponding unit in the Armed Forces.

Be that as it may, in special circumstances, the senior officer of a detached unit, establishment or squadron may be authorized by the appropriate superior authority to convene a court martial given that the authority to convene a court-martial may be delegated by the appropriate superior authority: Nigeria Air Force v Obiosa




Jurisdiction of a Court Marshal over Persons:

By section 130 of the Armed Forces Act, the courts-martial shall have jurisdiction to try persons subject to service law. Those who are subject to service law are members of the Nigerian Army, Nigerian Navy and Nigerian Air Force services.
Thus, members of the Police Force, Customs and Immigrations Services, Prisons Services, National Drug Law Enforcement Agency (NDLEA), Civil Defence, etc are not subject to the provisions or service law even though they bear arms.

Take notice that, the trial of civil offences by a court marshal does not oust the jurisdiction of a civil court to try such offences. However, any civil court that tries a person already convicted by a court-marshal shall in imposing sentence have regard to any sentence already imposed by the court-marshal: Section 170(2) of the Armed Forces Act. But if the officer was already tried by a civil court the court-marshal can no longer try him.

Also, whereas a general court-martial can only impose a sentence of death when it consists of at least seven members; a special court-marshal shall have the jurisdiction and powers of a general court-marshal, except that where the special court marshal consists of only two members, it shall not (a) impose a sentence of imprisonment for a term which exceeds one year or (b) impose a sentence of death.

The offences that are triable by the courts marshal may be a military offence or a civil offence. The military offences include (a) aiding the enemy (b) cowardly behaviour (c) muting (d) insurbordination (d) absence from duty (e) malingering and drunkenness (f) navigation and flying offences (g) sodomy (h) sexual relation with the spouse of a service personnel (i) rape and carnal knowledge (j) irregular arrest and confinement (k) disgraceful conduct, etc. The civil offences include: assault, manslaughter, murder, robbery, extortion, burglary and so on. Trial by a court martial does not ground the plea of double jeopardy.

The decision of a court-marshal is by a simple majority of the members of the court and in the case of equality of votes the court shall acquit the accused person. Again, the decisions of a court-marshal are subject to confirmation by the convening officer. Also, a death sentence by a court-martial cannot be executed without the approval of the President and Commander-in-Chief of the Armed Forces. Appeal from decisions of courts-martial lie to the Court of Appeal.

Lastly, a person shall not be tried under the Armed Forces Act unless his trial is begun within three months after he ceases to be subject to service law or within three years after the commission of the offence (in case of a person still subject to service law).

g.   Coroner’s Court:

A coroner’s court does not conduct a criminal trial. All it conducts is an inquest which may at times involve the calling of witnesses and admission of evidence. The purpose of an inquest is to determine the identity of the deceased, cause, time and place of death.


Note that where death occurs in a prison, police custody or after execution, the coroner’s inquest is mandatory. In other cases the coroner may conduct an inquest. 


© Onyekachi Duru Esq and www.legalemperors.com, 2016. (All Rights Reserved) Unauthorized use and/or duplication of this material without express and written permission from this site’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Onyekachi Duru Esq and www.legalemperors.com with appropriate and specific direction to the original content.

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