It sort of became mandatory for her to do so because everyone wanted them. (3winksdesign.com)
In 2012, the screening became mandatory in order for mothers to participate in the home visiting program, and it remains optional for mothers participating in the Part C early intervention program. (zerotothree.org)
Such screening has since become mandatory, unlike another recommendation, to screen all baggage checked into the hold. (newscientist.com)