When building an inground pool do the pavers have to be installed before completion of or final plaster pool?

No, the pavers do not have to be installed before the completion of or final plastering of the pool. In fact, it is generally recommended to install the pavers after the pool is finished to ensure that the pool is properly aligned and leveled with the surrounding area. This will help to prevent any potential issues with the pavers shifting or settling after they are installed. Additionally, installing the pavers after the pool is finished will allow you to more easily match the color and texture of the pavers to the pool itself, creating a cohesive and aesthetically pleasing look.