Well, if they have 'designated individual' to receive, hold onto, and take on all liabilities of being in possession of your firearm, then they are meeting the requirements of the law. Lockboxes are not required, but are the easiest solution for most departments/courts
-RCW 9.41.300.In addition, the local legislative authority shall provide either a stationary locked box sufficient in size for pistols and key to a weapon owner for weapon storage, or shall designate an official to receive weapons for safekeeping, during the owner's visit to restricted areas of the building. The locked box or designated official shall be located within the same building used in connection with court proceedings. The local legislative authority shall be liable for any negligence causing damage to or loss of a weapon either placed in a locked box or left with an official during the owner's visit to restricted areas of the building.