Chapter Review Date (a) A center must adopt and enforce a written policy describing whether it will conduct drug testing of its staff, volunteers, and contractors.(b) If a center conducts drug testing, the written policy must describe the method by which drug testing is conducted.(c) If a center does not practice drug testing, the written policy must state that the center does not conduct drug testing.(d) A center must provide a copy of the policy to anyone applying for services from the center and any person who requests a copy of the policy.