Section 143:
Consent, etc., of a competent authority may be proved by writing under its signature.
Whenever under this Act, the doing or the omitting to do anything or the validity of anything depends
upon the consent, approval, declaration, opinion or satisfaction of the competent authority, a written
document signed by the competent authority, purporting to convey or set forth such consent, approval,
declaration, opinion or satisfaction shall be sufficient evidence thereof.