New Delhi, March 24 :    New Delhi, March 24:  The government today linked the allocation of wireless spectrum to basic telecom service operators, with their ability to meet their subscriber base roll-out obligations within a given period. Simultaneously, it also threatened to take back spectrum allocations if the targets are not achieved during the given period. Existing operators, who have been permitted to use bandwidth in hand-held sets in wireless in local loop (WiLL) system, have also been brought under this regime. Further, those licencees, who are unable to provide the number of telephones they have committed in their agreements, for any of the first three phases as stipulated in the guidelines, shall forfeit their right to use the spectrum. This will be regardless of any other action that may be taken by the licensor, a release issued here today said. Any spectrum, already allocated to the basic operators and not effectively used, shall be withdrawn a year after the date of allocation, and, without further reference to the allottee, shall be re-allotted to other users. The government today also finalised future procedures for allotting spectrum to basic service operators in designated frequency bands, on a first-come-first-served basis. Under the norms, on installation of Point of Presence (PoP) in a Short Distance Charging Area (SDCA) spectrum to the extent of 2.5 MHz+2.5 MHz, in 824-844 MHz paired with an 869-889 MHz band will be allocated, which is expected to be a cost-effective solution for telephone companies. Subsequent allocation of the spectrum up to total of 5 MHz has been linked to the roll-out obligations in terms of setting up of PoP in the various SDCAs. 'This allocation of spectrum linked with the roll-out will see a faster roll-out of the network by basic service operators, with cost-effective solutions,' a senior department of telecommunications (DoT) official said. 'Meeting the roll-out obligations will be a tough challenge and it may not be technically possible in the absence of quick clearances from various other ministries. It is an issue which has not been solved yet. Under the circumstances, the target becomes more difficult,' a senior executive with a basic service provider said. For Wireless Access Systems in local area, spectrum not more than 5MHz +5 MHz in 824-844 MHz, paired with 869-889 MHz band or 5 MHz in 1880-1900 MHz band for micro-cellular architecture base system shall be allocated to any basic service operator, including existing ones like Mahangar Telephone Nigam Limited, Bharti and Shyam Telecom. However, the government directives will be subject to the outcome of the petition filed by the Cellular Operators Association of India (COAI) before the Telecom Disputes Settlement Appellate Tribunal (TDSAT) against the Union of India.