"Sec. 1   RCW 59.18.075 and 1992 c 38 s 4 are each amended to read as follows:
     (1) Any law enforcement agency which seizes a legend drug pursuant to a violation of chapter 69.41 RCW, a controlled substance pursuant to a violation of chapter 69.50 RCW, or an imitation controlled substance pursuant to a violation of chapter 69.52 RCW, shall make a reasonable attempt to discover the identity of the landlord and shall notify the landlord in writing, at the last address listed in the property tax records and at any other address known to the law enforcement agency, of the seizure and the location of the seizure of the illegal drugs or substances.
     (2) Any law enforcement agency which arrests a tenant for threatening another tenant with a firearm or other deadly weapon, or for some other unlawful use of a firearm or other deadly weapon on the rental premises, or for physically assaulting another person on the rental premises, shall make a reasonable attempt to discover the identity of the landlord and notify the landlord about the arrest in writing, at the last address listed in the property tax records and at any other address known to the law enforcement agency.
     (3)(a) A law enforcement agency that has probable cause to believe that a tenant or other occupant of a rental unit has committed a criminal street gang-related offense as defined in RCW 9.94A.030 shall make a reasonable attempt to discover the identity of the landlord and notify the landlord in writing, at the last address listed in the property tax records and at any other address known to the law enforcement agency, of the criminal street gang-related offense on the rental premises.
     (b) For the purposes of this subsection, the law enforcement agency shall include the following information with the notice:
     (i) The name of the tenant and the individual or individuals who were involved in the criminal street gang-related offense;
     (ii) The rental unit where the incident occurred;
     (iii) The date of the incident;
     (iv) Actions taken by the law enforcement agency in response to the incident;
     (v) A statement outlining the authority of a landlord under chapter 59.12 RCW to commence an unlawful detainer action against a tenant who has committed or permitted gang-related activity at the premises; and
     (vi) Penalties the landlord may face for failure to abate a nuisance."