/* CHESTERFIELD PL */
if year = 1988 and FSCSKEY = 'MA0060' then newkey = 'MA0375';
if year = 1989 and FSCSKEY = 'MA0060' then newkey = 'MA0375';
if year = 1990 and FSCSKEY = 'MA0060' then newkey = 'MA0375';
if year = 1991 and FSCSKEY = 'MA0060' then newkey = 'MA0375';