A Islamic Religious teacher and a Muslim religious teacher is called a Mullah
A Caliph or khalifa is a sort of religious dictator, an Islamic ruler, considered to be the political-religious leader of an Islamic community of believers, ruling in accordance with Islamic law.
ISLAM has Shari'a; Shari'a is Islamic Religious Law.
Fuad Al-Omar has written: 'Islamic banking' -- subject(s): Banking law (Islamic law), Banks and banking, Islam, Religious aspects, Religious aspects of Banks and banking
Sharia'
shareaa
They are called Sharia law.
FATWA
by guiding the flock and maintain Islamic law
the Islamic law code is called sharia
The Islamic guidelines for righteous living are called the Islamic law or Shariah. Refer to related question below.
1. Imam 2. Qari