The trustee may deed to a cemetery association, organized as provided by law for the incorporation of nonprofit corporations, an amount of land, not exceeding two blocks, as may be necessary for the purposes of the association. The deed shall be executed upon petition of the officers of the cemetery association. The petition shall describe the land, and be accompanied by proof satisfactory to the trustee that it has been and is being used for cemetery purposes, that no discrimination is practiced in granting permits for burial therein and that there is no conflicting claim to the land.