There is hereby authorized to be appropriated as annual grants out of any available funds in the Treasury of the United States Virgin Islands, such amounts as shall be determined by the Legislature, for the purpose of assisting in training and camping activities of the Boy Scouts, Sea Scouts and Girl Scouts of the Virgin Islands. The appropriate fiscal officers of the aforesaid organizations shall render annual accounts of the application of the grants herein authorized according to the appropriation under which the same may have been advanced to them.