The department may work with human trafficking victim advocates in developing informational posters for placement in rest areas. The department may adopt policies for the placement of these posters in rest areas and these policies must address, at a minimum, placement of the posters in bathroom stalls. The posters may be in a variety of languages and include toll-free telephone numbers a person may call for assistance, including the number for the national human trafficking resource center at (888)373-7888 and the number for the Washington state office of crime victims advocacy at (800)822-1067.