What was the Pay Related Deduction for?

Its not linked to your Public Sector Pension , it was a trick slipped into a pay restoration deal which made the "Pension Levy" legal , the big difference between ASC and the "Pension Levy " is that ASC is charged only on your pensionable pay and allowances but the Pension Levy was charged against all pay . It altered your original contract terms without your consent under FEMPI but made it legal in ASC which by the way did not even match the pay restoration in that paydeal , the Unions and pre 95 sold everybody else down the river on that one .
Exactly pay restoration then only based on basic pay not on allowances, slight of hand is marvelous