https://www.epo.org/en/service-support/faq/applying-patent/cnipa-epo-pilot-programme/options-available-expediting-5
What must I do in order to remain in the PACE programme?
In order for your application to remain in the PACE programme, you must take care not to delay the proceedings. In particular:
- You must not ask for any time extensions.
- You must file a reply to any communication from the EPO within the basic time limit.
- You must not risk any loss of rights or a refusal.
- You must pay the renewal fees within the basic time limit (Rule 51(1) EPC) and must not make use of the six-month period available for paying them with a surcharge (Rule 51(2) EPC).