What do you mean by no contribution shall be paid retroactively?

The phrase "no contribution shall be paid retroactively" means that any payments or contributions made to a fund, program, or agreement will only apply from the date they are established onward, without any back payments for previous periods. Essentially, it indicates that there will be no adjustments or payments for time prior to the effective date of the agreement or policy. This ensures clarity and avoids complications related to past financial obligations.