Be it enacted by the Senate and House of Representatives
in General Court assembled, and by the authority of the same,
Section 17 of chapter 209C of the General Laws, as appearing in the 1988 Official Edition, is hereby amended by striking out the first sentence and inserting in place thereof the following sentences:- In an action to establish paternity under this chapter, the court shall, on a motion of a party, and upon a proper showing, order the mother, the child, and the putative father to submit to one or more blood or genetic marker tests, to be performed by a duly qualified physician or other such expert. An affidavit by the mother or the putative father alleging that sexual intercourse between the mother and the putative father occurred during the probable period of conception shall be sufficient to establish a proper showing. The court may, in its discretion, order any person properly made a party under this chapter to submit to such testing.