The European Market Infrastructure Regulation (EMIR) is a European regulation that comprises rules governing central counterparties and trade repositories, and is intended among other things to strengthen the supervisory framework for transactions in OTC derivatives by increasing the stability, transparency and efficiency of the derivatives markets.

For the entire collection of documents relating to this supervisory area, please consult the French or Dutch site.
You can, however, consult a selection of documents in English:

Circulars, communications and handbook
Questions and answers (FAQ)