RFC North Sea - Med has eight border sections for which two types of procedures exist between the neighbouring infrastructure managers:

Bilateral agreements

These documents provide general information on national rules.

Border section procedures

These technical documents are made for each border section. They give information on the border section itself, such as language to use, communication means, line description and operational procedures.

List of bilateral agreements and border section procedures (including contact details) in Excel format

International Contingency Management

RNE drafted and updated the International Contingency Management Handbook. The purpose of this handbook is to describe the standards that allow the continuation of traffic flows at the highest possible level despite an international disruption and to assure transparency of the status of the disruption and its impact on traffic flows for all relevant stakeholders across Europe.

Also, RFC North Sea - Med published Re-Routing scenarios (in PDF) in order to deal with international disruption on our RFC. Linked, a table with the full technical parameters is published in Excel format. 

Priority rules in case of disturbance

For all the countries of the corridor except Belgium, these rules, per country, can be downloaded here. They are also listed on RNE website.
For Belgium, these rules are available in Infrabel's network statement (§4.10)

More information can be found in CID Section 4: Procedures for capacity & traffic management