(1) For the purpose of ver ifying the correct ness of commercial weights and measures and weighing and measuring - inst ruments used in transac tion s for tra de or comm erce, the Sta te Govern ment may cause t o be prepar ed as many sets of au the nti ca ted sta ndard weights and measures as i t may deem necessary to be called the working standard s, and specia l sets of working standa rds in relation to bull ion inc lud ing prec ious stones.
(2) Th e working stan dards shall be made of such ma ter ial and accord ing to such designs and specifications and shall be pre pared by such agency and shall be stam ped and au the nti ca ted by such person o r au tho rity and in such ma nner as m ay be prescribed.
(3) Th e working sta ndard s sha ll be kep t a t such places, in such custody and in such man ne r as may be prescribed.
(4) A working sta ndard shall be verified with the seco ndary sta ndard and marked by such persons, at such places, a t such inte rva ls and in such manner as may be pre scr ibe d:
Provided th at a working sta ndard in relatio n to bul lion and precious stones shall be verified with the reference standa rd.
(5} A working sta ndard which is not so verified and marked within the prescribed per iod shall not be deemed legal or be used for the purposes of this Act.
(6) A working sta ndard which has become defect ive shall no longer be legal or be used for t he purposes of this Act , unt il it has been verified and marked in the prescr ibed manne r.