A cemetery district may jointly operate or provide, cooperate to operate and provide and/or contract for a term of not to exceed five years to provide or have provided public cemetery facilities or services, with any other public or private agency, including out of state public agencies, which each is separately authorized to operate or provide, under terms mutually agreed upon by such public or private agencies. The governing body of a cemetery district may join with any other public or private agency in buying supplies, equipment, and services collectively.