Nigeria

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(2) The State shall direct its policy towards ensuring:
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(d) … reasonable national minimum living wage,
… (Sec. 16)

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(3) The State shall direct its policy towards ensuring that –
(a) all citizens, without discrimination on any group whatsoever, have the opportunity for securing adequate means of livelihood as well as adequate opportunity to secure suitable employment;
(b) conditions of work are just and humane, and that there are adequate facilities for leisure and for social, religious and cultural life;
(c) the health, safety and welfare of all persons in employment are safeguarded and not endangered or abused;
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(e) there is equal pay for equal work without discrimination on account of sex, or on any other ground whatsoever;
… (Sec. 17)

(1) Notwithstanding the provisions of sections 251, 257, 272 and anything contained in this Constitution and in addition to such other jurisdiction as may be conferred upon it by an Act of the National Assembly, the National Industrial Court shall have and exercise jurisdiction to the exclusion of any other court in civil causes and matters –
(a) relating to or connected with any labour, employment, trade unions, industrial relations and matters arising from workplace, the conditions of service, including health, safety, welfare of labour, employee, worker and matters incidental thereto or connected therewith;
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(d) relating to or connected with any dispute over the interpretation and application of the provisions of Chapter IV⁵ of this Constitution as it relates to any employment, labour, industrial relations, trade unionism, employer’s association or any other matter which the Court has jurisdiction to hear and determine;
(e) relating to or connected with any dispute arising from national minimum wage for the Federation or any part thereof and matters connected therewith or arising therefrom;
(f) relating to or connected with unfair labour practice or international best practices in labour, employment and industrial relation matters;
(g) relating to or connected with any dispute arising from discrimination or sexual harassment at workplace;
… (Sec. 254C)

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34. Labour, including trade unions, industrial relations; conditions, safety and welfare of labour; industrial disputes; prescribing a national minimum wage for the Federation or any part thereof; and industrial arbitration.
… (Second Schedule – Legislative Powers, Part I – Exclusive Legislative List)