(a) The governing boards of two or more school districts may enter into an agreement, for a term not to exceed five school years, for the interdistrict attendance of pupils who are residents of the districts. The agreement may provide for the admission to a district other than the district of residence of a pupil who requests a permit to attend a school district that is a party to the agreement and that maintains schools and classes in kindergarten or any of grades 1 to 12, inclusive, to which the pupil requests admission. The agreement shall stipulate the terms and conditions under which interdistrict attendance shall be permitted or denied. The supervisor of attendance of the district of residence shall issue an individual permit verifying the district`s approval, pursuant to policies of the board and terms of the agreement, for the transfer and for the applicable period of time. A permit shall be valid upon concurring endorsement by the designee of the governing board of the district of proposed attendance. The stipulation of the terms and conditions under which the permit may be revoked is the responsibility of the district of attendance. (b) In addition to the requirements of subdivision (e) of Section 48915.1, and regardless of whether an agreement exists or a permit is issued pursuant to this section, any district may admit a pupil expelled from another district in which the pupil continues to reside.