Closing the Law Enforcement Consent Loophole Act of 2021 This bill establishes a framework to prohibit law enforcement officers at the federal, state, and local levels from engaging in sexual acts with individuals who are in custody. At the federal level, the bill makes it unlawful for a federal law enforcement officer who is acting under color of law to engage in a sexual act with an individual who is under arrest, in detention, or in custody. Consent is not a defense to prosecution for unlawful conduct. A violator is subject to criminal penalties—a fine, a prison term of up to 15 years, or both. At the state and local level, the bill conditions eligibility for funds under the Community Oriented Policing Services program on the enactment of a similar law.