Is related person defined in the gst act, if yes under which section? and if no then in which act we should refer for the definition of related person?

Reply—As per explanation to Section 15 of CGST Act—

For the purposes of this Act,––

(a) persons shall be deemed to be “related persons” if––

(i) such persons are officers or directors of one another’s businesses;

(ii) such persons are legally recognised partners in business;

(iii) such persons are employer and employee;

(iv) any person directly or indirectly owns, controls or holds twenty-five per cent. or more of the outstanding voting stock or shares of both of them;

(v) one of them directly or indirectly controls the other;

(vi) both of them are directly or indirectly controlled by a third person;

(vii) together they directly or indirectly control a third person; or

(viii) they are members of the same family;

(b) the term “person” also includes legal persons;

(c) persons who are associated in the business of one another in that one is the sole agent or sole distributor or sole concessionaire, howsoever described, of the other, shall be deemed to be related