"Candidates on the MCC Portfolio application path must document at least 10 hours of Mentor Coaching on their application. Mentor Coaching hours submitted with an MCC Credential application cannot be the same Mentor Coaching hours applied toward a previous application for the ACC or PCC Credential. Candidates on the Level 3 application path completed Mentor Coaching as part of their Level 3 coaching education program.
The Mentor Coaching hours must occur over a three-month period or longer. Of the 10 hours of mentoring, three hours must be one-on-one. The remaining seven hours may be one-on-one or in a group.
For the MCC Credential, the Mentor Coach must be a current ICF Credential-holder in good standing at the MCC level."
in ICF website