To Stop change of USER Status till specific System Status

Hello All,

We have an issue we have created following WBS user status in PS:-

1. 1) INIT- Scheduling, Budgeting and Date planning is allowed rest all are Forbidden in this status
2. 2) BGRL – In this Budget Release is allowed only rest all are forbidden.
3. 3) EXCT – In this all transaction are allowed.

Issue is that we have provided the authorization key to Executive Director.

But the Director has requested that the user status should required to be dependent on System status

What currently user are doing:-

1) In INIT  - They do Scheduling, Date Planning & Budgeting ( System Status - CRTD, BUDG, )

After this authorized person changes the User status to BGRL.

2) IN BGRL - User do nothing (System Status - CRTD, BUDG)

After this authorized person changes the User status to EXCT Without releasing Budget (without running CJ32/CJBV.)

3) IN EXCT User Start all activities (System Status REL, BUDG)

We want a stop that until in BGRL Status ( System Status shows - CRTD, BUDG, AVAC) no. one is allowed to changed the user status to EXCT FROM BGRL.

Regards

Rahul