Appeal to board deemed granted, when.

If the appeal is not denied within thirty days after the notice is filed with the board, the appeal shall be deemed to have been granted: PROVIDED, That the board may extend the time within which it may act upon such appeal, not exceeding thirty days.[ 1971 ex.s. c 289 s 70; 1961 c 23 s 51.52.090. Prior: 1957 c 70 s 59; 1951 c 225 s 9; prior: 1949 c 219 s 6, part; 1943 c 280 s 1, part; 1931 c 90 s 1, part; 1929 c 132 s 6, part; 1927 c 310 s 8, part; 1911 c 74 s 20, part; Rem. Supp. 1949 s 7697, part.]Notes:Effective dates—Severability—1971 ex.s. c 289: See RCW 51.98.060 and 51.98.070.