641—99.1 (144) Foundling registration. The certificate for a living infant of unknown parentage is to be filed on a regular live birth certificate and shall:
	  1. 	 Have “foundling registration” plainly marked in the left top margin of the certificate;
	  2. 	 Show the required facts as determined by approximation and have parentage data left blank;
	  3. 	 Have the certification of the attendant changed to read “signature of custodian” indicating title, if any.