Fiqh Ahmadiyya (can be read online at
Ahmadiyya Muslim Community - Fiqah-e-Ahmadiyya and bought at
Fiqa Ahmadiyya (Ibadaat)) summarizes Mirza Sahib's teaching regarding fiqh.
There are offices within Jamaat Ahmadiyya where Ahmadi scholors of Quran and Hadiths write opinions on contemporary issues in order to enhance the school of thought. The institution of Majlis-e-Shurah at many different levels also help in this regard.