Etymology

The word Naib

Naib

Naib is an Arabic term for a local leader in some parts of the Ottoman Empire and eastern Caucasus.Naib or NAIB may also refer to:*National Association of Intercollegiate Basketball or National Association of Intercollegiate Athletics...

 means assistant or deputy whilst Nazim

Nazim

A nazim is the coordinator of cities and towns in Pakistan. Nazim is the title in Urdu of the chief elected official of a local government in Pakistan, such as a district, tehsil, union council, or village council....

is similar to a mayor, hence Naib Nazim is similar in function to a deputy mayor.He is also custodian of the house.
Naib nazam and Nazam was finished by govt of Pakistan in this time worked in Mansehra City Distric control to all work and administratoration civil work and other work - After the finished of govt of Musharaf when end of life of Naib nazam , nazam and union council .