Each nonperpetual care cemetery shall post in a conspicuous place in the office or offices where sales are conducted a legible sign stating: "This is a nonperpetual care cemetery." The lettering of this sign shall be of suitable size so it is easily read at a distance of fifty feet. Source: SL 1955, ch 97 , § 5; SDC Supp 1960, § 11.19A05.