The Chicago Police Department will implement stop-and-frisk reforms under a "landmark agreement" reached between the law enforcement agency and the American Civil Liberties of Union of Illinois, according to a Friday announcement.

The agreement comes after and is based on the recommendations cited in a March report from the ACLU on CPD's use of stop-and-frisk. The report showed that such practices are used frequently by Chicago police with little transparency and disproportionately affect the city's communities of color.

According to a joint press from the ACLU and the police department, the agreement calls for an independent evaluation of CPD practices and procedures, with independent reports on police stops and searches to be released publicly twice a year; additional data collection by police; increased police officer training; and greater transparency.

"When we issued our report a few months ago, it included a series of recommendations for change by the Chicago police," ACLU legal director Harvey Grossman said in a statement. "This agreement incorporates the bulk of those recommendations, and reflects the types of agreements that have been reached in other communities only after a long, protracted period of investigation and litigation. What we have done here is move past the litigation process and advanced directly to a collaborative process, to insure that stops on Chicago streets meet constitutional and legal standards."

Under the agreement, which takes effect immediately, former U.S. Magistrate Judge Arlander Keys will oversee implementation of the changes and review the police department's use of stop-and-frisk tactics.

"Judge Keys will produce public reports twice each year on investigatory stops and pat downs by Chicago police, assessing whether the CPD is complying with its legal requirements, including the Fourth Amendment requirement that there be reasonable suspicion of criminal conduct as a basis for a stop or search and that the stops do not have an impermissible racially-disparate impact prohibited by the Illinois Civil Rights Act," the news release states. "Judge Keys also is authorized to make recommendations for changes to CPD policies."

Regarding data collection, the agreement says Chicago police will have to document the race and gender of the person being stopped, the name and badge number of the police officer as well as where and why the stop occurred and whether it resulted in a frisk. Details on whether police discovered contraband during the stop and if they issued a warning, made an arrest or took no action will also have to be recorded.

Chicago police officers currently have to fill out contact cards for stops that do not lead to an arrest or ticket. Contact cards collect information on who was stopped and why the stop occurred. Officers have not had to record information about frisks.

"As the men and women of the Chicago Police Department work to make our city safer and identify the small subset of individuals who torment our neighborhoods with violence, it is imperative that we use every tool and resource in a way that is not only lawful but respectful of the residents we serve," said Chicago Police Superintendent Garry McCarthy. "We believe policing in Chicago must be strictly based on crime data, patterns, statistics and community intelligence, and this unprecedented agreement with the ACLU is a demonstration of CPD's commitment to fairness, respect, transparency, and underscores our willingness to work side by side with everyone as we work toward our shared goal of keeping our neighborhoods safe."

The agreement comes just over a week after an ordinance that would require the CPD to collect and publicly share data on all stops and frisks was introduced in the city council by lead sponsor Ald. Joe Moreno (1st).