True if this method is applicable, false otherwise.

The version with no arguments calls the static version with 3 arguments. 

This method is applicable if worker is eligible after 1978, it is not a totalization benefit, and it is an old-age case with prior disability entitlement in June 1980 or later that lasted to age 61, or a disability case with entitlement in June 1980 or later.

isApplicable Method