The answer is actually found in the definition in section 215.3 of "extension of credit":
"An extension of credit is a making or renewal of any loan, a granting of a line of credit, or an extending of credit in any manner whatsoever,...."
Although the loan when it was granted was not subject to Regulation O and its restrictions, any renewal or extension of the loan is an extension of credit in its own right, and would not be "grandfathered." The regulation requires that the loan conform to the regulatory restrictions upon renewal or extension.
_________________________
John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8