It shall be the duty of the cemetery authority of a public graveyard to receive by gift or bequest, real or personal property, or the income or avails of property which shall be conveyed in trust for the improvement, maintenance, repair, preservation and ornamentation of such interment, entombment, or inurnment rights or lots, vault or vaults, tomb or tombs, or other such structures in the cemetery or graveyard of which such board or trustees have control, as may be designated by the terms of such gift or bequest, and in accordance with such reasonable rules and regulations therefor, as shall be made by such board of directors or trustees, and such board of directors or trustees shall keep such trust funds invested in safe interest or income bearing securities, the income from which shall be used for the purpose aforesaid.