Book directly with the centre you have chosen. As regards your questions, did you have a look at the FAQ (frequently asked questions) ?

Contact the Union’s head office in Paris:

éthic étapes
27 rue de Turbigo
75002 - Paris
France
T. +33 (0)1 40 26 57 64
F. +33 (0)1 40 26 58 20
contact us !

The office is open from Monday to Friday from 9.30 am until 18 pm.