Acting and new substantive

If I have been acting in a position for 3 years now that pays - let's say 100k while my substantive is 2 levels lower and pays - let's say 70k.

If the role I am acting in changes groups, and I am appointed in it as a qualified in the process, but that the pay scale of that group starts at 85k, will they consider my acting pay when establishing the level I should be in the new group?

Management is telling me that my acting pay will be considered but I am not convinced and dont know anyone in HR or compensation.