The statutory base is Part 2 of the Companies (Audit, Investigations and Community Enterprise) Act 2004. Under section 33, the name must end with "community interest company" or "c.i.c.", and a Welsh company may use "cwmni buddiant cymunedol" or "c.b.c."; in practice the Regulator also accepts "CIC". Under section 36, the application must be accompanied by a community interest statement signed by each first director and a declaration that the company will not be an excluded company, which together form the CIC36. The Regulator decides eligibility under section 36A.
Detailed rules sit in the Community Interest Company Regulations 2005. Regulation 7 requires a company limited by guarantee to include the provisions of Schedule 1, while regulation 8 gives a company limited by shares the choice between Schedule 2, where only asset-locked bodies can receive dividends, and Schedule 3, which allows dividends to private investors. Paragraph 1 of each schedule is the asset lock: no transfer of assets other than for full consideration, unless the transfer goes to a specified asset-locked body, to another one with the Regulator's consent, or is made for the benefit of the community. The full text is on the official legislation.gov.uk page for the Community Interest Company Regulations 2005.
Dividends follow their own rules. Under regulation 17, a dividend needs an ordinary or special resolution of the members, and the total declared for a financial year cannot exceed the maximum aggregate dividend, which regulation 22 currently sets at 35% of distributable profits. Interim dividends decided by the directors alone are not permitted, because regulation 10 forbids articles that let a dividend be declared without a members' resolution. On a winding up, regulation 23 caps what shareholders receive at the paid up value of their shares.