An uncertified union or unrecognized employee organization has a limited access to use a school mailboxes to contact employees
PERB decision U-3885
PERB has held that the Taylor Law does not require a public employer to give an unrecognized or an uncertified union competing with the recognized or certified employee organization equal access to teachers or mailboxes for the purpose of soliciting members except when such contact is timely in connection with a relevant challenge period.