External advisers to the National Assembly's legislative and policy research organization have reportedly decided that the interior ministry's launch of a unit to oversee police operation is unlawful.

According to the National Assembly Research Service, the experts determined that any command and oversight relationship between the interior minister and the police chief is impermissible under the existing government organization law.

The determination was revealed in the research organization's response to a related inquiry by main opposition Democratic Party(DP) Rep. Lee Hae-sik.

The advisers also pointed to the illegality of the unit’s establishment without a review by the independent National Police Commission.

Some advisory members noted, however, that only about two-thousand-500 cases for review were brought to the commission in the past 30 years, indicating that not all cases are required to go through the panel.