Why do we need this law?

Taken directly from The General Laws of Massachusetts: Chapter 272, Section 80E

--- --- ---

CHAPTER 272.CRIMES AGAINST CHASTITY, MORALITY, DECENCY AND GOOD ORDER

Chapter 272: Section 80E Use of decompression chambers for putting animals to death

  Section 80E. Whoever puts any animal to death by the use of a decompression chamber shall be punished by a fine of not less than one hundred dollars.