To be eligible for SNC, the participant must meet the December 1973 eligibility requirements for Old Age Assistance (OAA), Permanent and Total Disability (PTD), or Aid to the Blind (AB). The determination of eligibility is always based on whichever eligibility factors in effect in December 1973 (for either OAA, PTD, or AB) best meet the situation of the participant. These eligibility factors are explained in Manual Section 1000.000.00 December 1973 Eligibility Requirements. If the participant is ineligible on any of these factors, reject the SNC application and explore eligibility for SAB, BP or MHN.