Whenever any headstone or headstones, posts, railings, or other structures upon a lot in any cemetery shall have fallen into decay or become dangerous to those entitled to enter into said cemetery grounds, the company, association, or management, conducting the said cemetery, shall have the right, and such right is hereby conferred, to remove the headstone or headstones, posts, railings, or other structures, so out of repair and dangerous: Provided, however, That before any such removal shall be made, notice of the intention so to do shall be given to the owners of the lots or to their representatives, either by registered mail, or, if their address is unknown, then by advertisement, once a week for three weeks, in a paper of general circulation in the county where the cemetery is located or has its chief place of business.