Despite the gauntlet that is the United States Patent and Trademark Office, many of the trademarks which are allowed by the Trademark Office are opposed by some competitor in an administrative law tribunal because they feel the mark violated one of the rules of registration.

FORBES: Gang Green: Rules Are Tightening. Don't Say Green If You Don't Mean Green.

Changes in the rules governing the registration of voters now mean that people have to positively apply to be included on the electoral role.

BBC: NEWS | UK | Scotland | Voting revamp on the cards

Labour first floated the idea of relaxing the rules regarding registration when they were in office.

BBC: New GP registration system tested

The rules were made final in fall of 2010 and the new PTIN online registration system opened for business.

FORBES: IRS Targets 100,000 Tax Professionals For Noncompliance

It also said that promoters could sidestep rules requiring registration of corporate tax shelters, because the scheme was being sold to individuals.

FORBES: U.S. tax rackets

The new SEC rules also cover a wide range of additional topics, including establishing new exemptions from SEC registration and reporting requirements for certain advisers, and reallocating regulatory responsibility for advisers between the SEC and states.

FORBES: SEC Finally(!) Issues "Hedge Fund Rules" Required Under Dodd-Frank; Postpones Mandatory Registration Until Mach 2012

Juvenile registration has long been a thorny issue even among supporters of the registry and the rules have evolved over time.

CNN: Report: Registry does more harm than good for teen sex offenders