The TCF is widely acknowledged. It follows the European standards for language tests as set forward in the Common European Framework of Reference for Languages and is equal to DALF, also offered by the CIEP.
Lowest level is A1 indicating beginner, top fluency levels are C1 and C2.
Level C1 and C2 indicate advanced mastery of French. French elite university Sciences-Po use TCF level C1 as the primary language prerequisite for evaulating the abilities of non-native speakers to follow academic discussions and carry out academic research in the French language. The test is made up of compulsory and optional sections. The reading, listening and language structures sections are mandatory while the writing and speaking sections are optional.