Although the vast majority of bills are government bills, there are opportunities for non-government/private Members to introduce their own proposals for legislation known as Private Members' Bills. Under Standing Order 191 a private Member may introduce a public bill. Members have great freedom to introduce bills on any subject, with the exception that only Ministers may introduce a bill that imposes a tax or raises money.
Private Members' Bills can only be introduced during the time set aside in the current routine of business. This is on Thursday mornings after the giving of General Business Notice of Motions and Government Business. The Member in charge of the bill has unlimited speaking time when making their second reading speech. After the bill has been introduced it follows the same procedures as other bills, including being set aside for five clear calendar days before the second reading debate can be resumed.