Contract Amendments

You can request the extension of your contract at the earliest four weeks before its expiry.

You may request all other changes at any time.

1. Extension modalities:

Your Contract Amendment request must be submitted via EDH (or exceptionally in the event of an EDH technical issue, via the paper contract amendment form).

2. Duration of the contract:

The maximum duration of each contract extension is 5 years for Users and Cooperation Associates, and 1 year for Visiting Scientists.

N.B.: short-term contracts cannot be extended. Should the period of association with CERN need to be prolonged, a new contract must be issued (a new EDH PREG must therefore be submitted).

3. List of possible contract changes and supporting documents :

Type of contract change

Initial document(s) required

Additional document(s) and action(s) required

Contract extension

EDH form

+

Home institution Declaration

For holders of Host State documents only :

– return your Swiss and French cards to the Users Office for extension, along with a copy of your passport / ID card.

Increase of annual average presence from 50% or less to 55% or more

(e.g.: from 40% to 100%)

EDH form

+

Home institution Declaration

Visit the Users Office to provide:

– a copy of your passport

– 3 passport-size photographs

+

– a copy of your D visa (for non-European / non-Schengen nationals only)

Increase of annual average presence between 55% and 100%

(e.g.: from 60% to 80%)

EDH form

+

Home institution Declaration (only in the event of a simultaneous contract extension)

N/A

Decrease of annual average presence from 55% and above down to 50% or less

(e.g.: from 100% to 20%)

EDH form

+

Home institution Declaration (only in the event of a simultaneous contract extension)

Return your Swiss and French cards to the Users Office for cancellation (+ your family’s cards if applicable), and contact the CERN Mobility Center to settle your Green Plate situation if applicable.

Decrease of annual average presence between 50% and 5%

(e.g.: from 40% to 10%)

EDH form

+

Home institution Declaration (only in the event of a simultaneous contract extension)

N/A

Change of experiment / project /Department

EDH form

N/A

Change of institute

EDH form

+

Home institution Declaration

N/A

Change of status

EDH form

+

Home institution Declaration

The procedure for changes of status.

If you are switching from a status handled by the HR Department (FELL, DOCT, PJAS, etc.) to a status handled by the Users Office (User, COAS or VISC) and encounter difficulties when trying to access to the Contract Amendment form, please contact your department secretariat.

Change of organic unit

EDH form

N/A