Termination and Suspension : Must approval be sought prior to any termination and/or suspension of an Access Agreement by an Access Provider?

Yes. Pursuant to section 5.17.6 of the MSA, prior to terminating or suspending or seeking to materially vary an Access Agreement or access to any network facilities or network services provided under it, an Access Provider must inform 

the Commission in writing of the action proposes to take and the reasons why such  action is appropriate. The Access Provider shall not terminate or suspend  or seek to materially vary the Access Agreement or access to any network facilities or network services provided under it until such time and on such conditions as the Commission may specify.