It should only be considered once all other options have been explored, and after a financial assessment.
A spokesman for Mr Corbyn said the proposal to give sweeping new powers to the NEC would be "considered" once it was formally submitted.
Christine C. Quinn, the City Council speaker, did not express an opinion about the proposal but said it would be considered once it was formally introduced.
But he said that could only be considered once Britain had explained exactly what it wanted from its future relationship with the EU, and the bloc had established what it could accept.
Some changes to the inflation-targeting policy framework are, however, likely to be considered once Mark Carney succeeds Mervyn King as governor in July, since the Canadian appears to hold a more optimistic view than Mr King that there is more that monetary policy can do to stimulate the economy at the "zero lower bound" (when nominal policy rates are close to 0%).
The coalition has already moved to raise the state pension retirement age from 60 for women and 65 for men to 66 for all workers in 2020, rising to 67 in 2028, with further increases due to be considered once in each five-year parliament.
To construct cities around the belief that urban design and the public realm can be considered once land deals, planning policy and economic viability have been settled, is to submit our cities to a form of vandalism from which few will recover.
Current collector geometry must also be considered once this is done.
However, a non-negligible risk of re-bleeding has to be considered once the material has been absorbed.
The steel link beams have been considered once without stiffeners and once with them to see how they improve its behavior.
Hence, setup times need only be considered once, and many instances can be booted from the snapshot and be ready to run.
