Are there any limitations on the state's ability to make special provisions for certain groups under Article 15?
Yes, there are limitations on the state's ability to make special provisions for certain groups under Article 15. The article lists several specific areas where such special provisions cannot be made:

(a) Access to shops, public restaurants, hotels, and places of public entertainment; or (b) the use of wells, tanks, bathing ghats, roads, and places of public resort maintained wholly or partly out of State funds or dedicated to the use of the general public.

Additionally, Article 15(4), Article 15(5), and Article 15(6) provide specific limitations on making special provisions for certain groups, such as women and children, socially and educationally backward classes, Scheduled Castes, Scheduled Tribes, and economically weaker sections of citizens.