In adopting permanent rules that would increase or decrease the expenditures or revenues of a unit of local government, the agency shall consider the timing for implementation of the proposed rule as part of the preparation of the fiscal note required by G.S. 150B-21.4(b). If the computation of costs in a fiscal note indicates that the proposed rule change will disrupt the budget process as set out in the Local Government Budget and Fiscal Control Act, Article 3 of Chapter 159 of the General Statutes, the agency shall specify the effective date of the change as July 1 following the date the change would otherwise become effective under G.S. 150B-21.3.