Kan. Stat. § 19-4477
On the second Monday of January next following the adoption of the provisions of this act and thereafter, the agency shall assume and shall exercise all powers, duties and responsibilities of the city marshal or chief of police and police officers of each city located within the county relating to the enforcement of state laws and ordinances of the cities located within such county, including the service of process issuing from the municipal court. The agency also shall assume the responsibility for the investigation of applicants for licenses to engage in or the business of selling cereal malt beverages, selling alcoholic liquor and operating private clubs in which cereal malt beverages or liquor is dispensed. Upon demand, the city marshal or chief of police of such cities shall transfer and deliver to the agency all records of the police department relating to the violation of laws of the state and ordinances of the city, together with the custody of all prisoners held for violations of ordinances of the city. On the date hereinbefore fixed for the transfer of law enforcement authority, those officers and employees of cities located within the county specified in K.S.A. 19-4476 who have not previously joined the agency shall become members of the department if they so elect: Provided, That such officers and employees shall have filed in writing with the director a request to transfer at least fifteen (15) days prior to such transfer date.
K.S.A. 19-4477