RCW 27.12.270 Rules and regulations — Free use of libraries.
Every library established or maintained under *this act shall be free for the use of the inhabitants of the governmental unit in which it is located, subject to such reasonable rules and regulations as the trustees find necessary to assure the greatest benefit to the greatest number, except that the trustees may charge a reasonable fee for the use of certain duplicate copies of popular books.
http://apps.leg.wa.gov/rcw/default.aspx?cite=27.12.270
