Massachusetts General Laws Part IV. Crimes, Punishments and Proceedings in Criminal Cases (Ch. 263-280) Ch. 272, § 29A

(a) Whoever, either with knowledge that a person is a child under eighteen years of age or while in possession of such facts that he should have reason to know that such person is a child under eighteen years of age, and with lascivious intent, hires, coerces, solicits or entices, employs, procures, uses, causes, encourages, or knowingly permits such child to pose or be exhibited in a state of nudity, for the purpose of representation or reproduction in any visual material, shall be punished by imprisonment in the state prison for a term of not less than ten nor more than twenty years, or by a fine of not less than ten thousand nor more than fifty thousand dollars, or by both such fine and imprisonment.

(b) Whoever, either with knowledge that a person is a child under eighteen years of age or while in possession of such facts that he should have reason to know that such person is a child under eighteen years of age, hires, coerces, solicits or entices, employs, procures, uses, causes, encourages, or knowingly permits such child to participate or engage in any act that depicts, describes, or represents sexual conduct for the purpose of representation or reproduction in any visual material, or to engage in any live performance involving sexual conduct, shall be punished by imprisonment in the state prison for a term of not less than ten nor more than twenty years, or by a fine of not less than ten thousand nor more than fifty thousand dollars, or by both such fine and imprisonment.

(c) In a prosecution under this section, a minor shall be deemed incapable of consenting to any conduct of the defendant for which said defendant is being prosecuted.

(d) For the purposes of this section, the determination whether the person in any visual material prohibited hereunder is under eighteen years of age may be made by the personal testimony of such person, by the testimony of a person who produced, processed, published, printed or manufactured such visual material that the child therein was known to him to be under eighteen years of age, or by expert medical testimony as to the age of the person based upon the person's physical appearance, by inspection of the visual material, or by any other method authorized by any general or special law or by any applicable rule of evidence.