допускаться с согласия(any variation of the agreed hourly rate and the date on which it shall take effect shall be subject to the consent of the Authorised Person. Alexander Demidov)
требовать письменного подтверждения от(and shall be subject to the written acceptance of the Company in accordance with sub-clause 11(a) as aforesaid, or if cancelled or re-scheduled at the request ... Alexander Demidov)
требовать письменного подтверждения(or for re-scheduling of deliveries will only be considered by the Company if made in writing and shall be subject to the written acceptance of the Company. Alexander Demidov)