TN 49 (04-12)
The statute provides three alternatives to the 1978 NS average index monthly earnings (AIME) PIA known as Guarantee PIAs. The guarantee PIAs are:
NS Transitional Guarantee (See RS 00605.025)
1977 Simplified old start (OS) (See RS 00605.050)
Disability insurance benefits (DIB) Guarantee ( See RS 00605.035)