No explosives shall be sold, furnished, or given away to any person under 21 years of age, whether such person is acting for himself or for another person, nor shall any such person be eligible to obtain any permit to receive explosives governed by the provisions of this part.

The reference to “under 21 years of age” in this section is unaffected by Section 1 of Chapter 1748 of the Statutes of 1971 or any other provision of that chapter.