Building ordinances may specify and regulate:

Building ordinances are regulations established by local governments to ensure public safety, health, and welfare in the construction and maintenance of buildings. They cover a wide range of aspects related to construction and property conditions, including safety standards, structural integrity, and the materials that must be used in different applications.

When it comes to the materials used in plumbing, building ordinances require compliance with certain standards to prevent issues such as leaks, contamination, and inefficiencies in water use. This ensures that plumbing systems are safe, functional, and environmentally sound. Therefore, it is essential that any materials used in public or private plumbing systems adhere to these established regulations set forth by building ordinances.

In contrast, property taxes, rental agreements, and property management fees pertain more to economic aspects of real estate transactions and tenant-landlord relationships, rather than the physical construction or safety of buildings. These issues are generally governed by property law and specific agreements rather than by local building codes. Thus, building ordinances are particularly focused on construction-related materials, making the specification and regulation of plumbing materials the correct context for this question.