Sect. 4. Minimum requirements for registration

(1) Any twenty-five or more persons by subscribing their names to the constitution of an organization concerned with employees and otherwise complying with this Act with respect to registration, may apply to the Registrar for registration as a trade union under this Act.

(2) Subject to subsection (3), any ten or more members of an organization concerned with employers by subscribing their names to the constitution of the organization and otherwise complying with this Act with respect to registration, may apply to the Registrar for registration as an employers' organization under this Act.

(3)...

[Grenada, Labour Relations Act, 1999]

Sect. 11(2).  Any seven or more members of an unregistered trade union or two or more members of an unregistered employers' organization, any of whom may be officers of the organization, may apply to the Registrar for registration in the prescribed form,

[Malawi, Labour  Relations Act, 1996]

Section 211. Every trade union needs, in order to exist and function, a minimum of thirty-five members.

Section 212. Employers’ trade unions must comprise at least seven employers.

[El Salvador, Labour Code, 1972 (Amended by Decree 859 (1994))]

Section 324. Trade unions may not have less than twenty members. Employers’ trade unions may not have less than three.

[Dominican Republic, Labour Code, 1992]