The fair credit billing acts purpose is to protect consumers from unfair billing practices and to provide a mechanism for addressing billing errors in "open end" credit accounts.
The truth lending act designed to promote the informed use of consumer credit.
Closed end Credit is a type of credit that should be repaid in full amount by the end of the term, by a certain date and time.
The credit card act is an act to make sure fair practices and transparent practices are used for a open end credit consumers.
Hope this helps.
:p