MPs have passed a motion transferring the responsibility for setting their pension payments to the Independent Parliamentary Standards Authority (IPSA).
A key amendment to the Pensions Bill has restricted the "core definition" of money purchase benefits, a lawyer says.
Legislation curtailing pension charges for deferred members has been announced by pensions minister Steve Webb.
The government has announced a six month delay in the increase in the state pension age in 2020.
The National Employment Savings Trust has unveiled some of the 25 employers already using its services.
Constraints put on the National Employment Savings Trust risk undermining the objectives of auto-enrolment, warn some of the legislation's main architects.
Steve Webb has reinforced his commitment to auto-enrolment being rolled out in 2012, amid reports the government is considering delaying the reforms.
The government must confirm whether auto-enrolment is to be put on hold or shelved or risk further undermining occupational pensions, industry figures argue.
Bosses have urged the government to clarify "current complexity and confusion" over the nuts and bolts of auto-enrolment.
Government has launched a consultation into increasing employee contribution rates for the local government pension scheme in a bid to save £900m.