The sector has been invited to tell parliament what it thinks of the Charities (Protection and Social Investment) Bill as it reaches committee stage in the House of Commons.
The bill passed its second reading yesterday and will now be scrutinised by the House of Commons Public Bill Committee, which has published a call for written evidence.
The bill would give extra powers to the Charity Commission, enabling it to issue and publish non-appealable statutory warnings to charities, automatically disqualify from trusteeship people with convictions for sexual offences, money laundering or terrorism offences, and to disqualify from trusteeship or senior charity management anyone whose conduct could reduce public trust in charities.
It would also give charities the ability to make social investments and includes provisions for charities to ensure third-party fundraisers behave ethically.
The parliamentary website urges those with "relevant expertise and experience or a special interest" in the bill to submit evidence.
The committee is expected to hold its first meeting on Tuesday 15 December.
Further dates are expected to be agreed once the committee has met, but it is not expected to take oral evidence.
The deadline for submissions is Thursday 7 January, when the committee will finish and report the bill back to MPs.
However, the call for evidence warned that the committee could no longer consider evidence after it reported and might report back before the 7 January deadline.
It said: "The sooner you send in your submission, the more time the committee will have to take it into consideration."