The 5-year rule for conversions no longer applies after age 59½. The 5-year rule for converted amounts only serves to to eliminate an early-distribution penalty on converted amounts. Amounts distributed after age 59½ are not early distributions.
Further, because your father is over age 59½ and he has met the separate 5-year rule for distributions to be qualified distributions, any distribution from his Roth IRAs is a qualified distribution, free of tax and penalty.
