DLG - Can we disagree with what is proposed?

We are going through the DLG process as my daughter has Muscular Dystrophy. One of the proposed adaptions is a downstairs wet-room. We have proposed a hydrotherapy bath with shower above as this will have a positive effect on her muscles but the proposal from the DFG assessor states a shower with shower-chair.

The plan is to have a bath installed for as long as possible but to set the plumbing out so the bath can be removed in the future and a shower set up as per the Part M building regs for adaptable bathrooms.

Do we have to accept the proposal from the DFG assessor?