Your customer wants to control which clauses appear in their Main Agreement, based on values...

Specify conditions in the Clause Library so that they are applied to all contract workspaces.

From the outline view of the Main Agreement in the contract workspace, select the condition to apply to each clause.

From the outline view of the Main Agreement in the template, select the condition to apply to each clause.

On the Conditions tab, select the clauses that are visible when each condition is true.