RCW 68.04.280
"Multiple interment."
"Multiple interment" means two or more human remains are buried in the ground, in outer burial enclosures or chambers, placed one on top of another, with a ground level surface the same size as a single grave or right of interment.
[ 2005 c 359 § 1.]
Structure Revised Code of Washington
Title 68 - Cemeteries, Morgues, and Human Remains
68.04.020 - "Human remains," "remains."
68.04.030 - "Cremated human remains."
68.04.165 - "Outer burial container."
68.04.190 - "Cemetery authority."
68.04.210 - "Cemetery business."
68.04.240 - "Owner of interment rights."
68.04.250 - "Interment right."
68.04.260 - "Scattering garden."
68.04.280 - "Multiple interment."
68.04.290 - "Alkaline hydrolysis" or "hydrolysis."
68.04.300 - "Hydrolysis facility."
68.04.310 - "Natural organic reduction."
68.04.320 - "Natural organic reduction facility."
68.04.900 - Construction—Title applicable to state registered domestic partnerships—2009 c 521.