Services of central, state ,union territory or local authority

reena (A) (26 Points)

06 July 2023  
As per the notification 12/2017 services by Central, state or union territory or local authority to a business entity excluding few services is exempt in gst
As per notification 13/2017 services provided by Central, state or union territory or local authority to a business entity excluding few services , RCM is applicable..

can anyone explain difference in above 2 with some example?