Oregon Revised Statutes Public Health and Safety § 440.305

(1) There hereby is created a health district territorially coterminous with each health district existing on July 2, 1957, if such existing health district was at that time a valid health district but for the fact that the electors of the district were required to have resided in the district for a period of not less than 90 days next preceding an election. In determining the boundaries of health districts created by this subsection, full effect shall be given to annexations effected by health districts prior to November 22, 1957, under ORS 441.205 to 441.410 (1957 Replacement Part).

(2) Health districts created by subsection (1) of this section are subject to and shall be governed by ORS 440.315 to 440.410.

(3) Health districts territorially coterminous with health districts created by subsection (1) of this section hereby are abolished.