Commission Implementing Regulation (EU) 2017/777 of 4 May 2017 initiating a review of Council Implementing Regulation (EU) No 501/2013 (extending the definitive anti-dumping duty on imports of bicycles originating in the People's Republic of China to imports of bicycles consigned from Indonesia, Malaysia, Sri Lanka and Tunisia, whether declared as originating in Indonesia, Malaysia, Sri Lanka and Tunisia or not) for the purposes of determining the possibility of granting an exemption from those measures to one Tunisian exporting producer, repealing the anti-dumping duty with regard to imports from that exporting producer and making imports from that exporting producer subject to registration