Concept: Flood plain zoning is a non-structural flood management measure. It controls the use of land in flood-prone areas so that damage to life and property can be reduced.
Step 1: Understanding flood plain zoning.
Flood plains are low-lying areas near rivers that are likely to be flooded. Flood plain zoning divides such areas into zones according to flood risk.
\[
\text{Flood plain zoning} \Rightarrow \text{Regulated land use in flood-prone areas}
\]
Step 2: Understanding features of the model bill.
A flood plain zoning authority is needed to identify and regulate flood-prone areas.
Restrictions on use of flood plains are important because unsafe construction must be avoided.
Compensation may be related to restrictions or regulated land use.
Step 3: Identifying the option not related to the model bill.
Rehabilitation is generally related to post-disaster recovery or shifting affected people after damage. The model bill mainly focused on zoning and regulating flood plains, not rehabilitation as a main feature.
Therefore, the correct answer is Rehabilitation.