PART SEVEN WITHDRAWING NUMBERS 25. Conditions for Withdrawing Numbers The Authority may withdraw a Block from an Assignment only if: 1) A Number in the Block is used for a service that does not satisfy the applicable Usage Conditions; 2) The Licensee uses the number range in a different manner than for which it was otherwise assigned; 3) The Block is needed for advancing a clearly identified national interest; or, 4) National Numbering Plan is amended. 26. Timing for Withdrawal of Numbers The Authority shall notify a Licensee about the nature of and the reasons for, a proposal to withdraw a Block from an Assignment to the Licensee at least one (1) year before the Authority withdraws the Block. 27. Implementation of Withdrawal of Numbers Where the Authority notifies a Licensee about a proposal to withdraw a Block from an Assignment to the Licensee: 1) The Licensee shall not thereafter bring into service any Numbers in the Block unless the Authority informs the Licensee that it has decided not to withdraw the Block; 2) The Licensee shall inform any affected customer about the reasons for the proposal to withdraw the Block and about replacements for the Numbers in the Block at least two (2) months before the Authority withdraws the Block; and, 3) The Licensee shall remove from service all of the Numbers in the Block at least one (1) month before the Authority withdraws the Block. PART EIGHT BRINGING NUMBERS INTO SERVICE 28. Appointment of Contact Person A Licensee shall identify and submit to the Authority details of a contact person intended to receive notifications about numbering and associated routing and traffic requirements. 29. Forwarding of Information About Contact Persons The Authority shall forward information about the contact details of persons who are provided by the Licensees under Article 28 of this Directive in response to requests for those details. 30. Timing of Bringing Numbers into Service 1) Every Licensee shall notify other Licensees and any relevant foreign Telecommunications Operators that traffic is to be routed to and from a Number at least thirty (30) working days before the Licensee brings the Number into service. 2) The Authority shall not be responsible for notifying any party that Numbers are to be brought into service. 31. Conditions for Bringing Numbers into service A Licensee may bring a Number into service if: 8