(1) Area 1 description.

(a) This area includes all lands lying within a boundary line starting at the northwest corner of Section 6, T14N, R28E; thence east along the Adams-Franklin County line thirteen miles more or less to the intersection with State Route 17; thence southeasterly along State Route 17, including the right of way, to the intersection with Highway 395 at the town of Mesa; thence southerly along Highway 395, including the right of way, seven miles more or less to the intersection with the common boundary between Sections 2 and 11, T11N, R30E at the town of Eltopia; thence east along the section line, one mile more or less to the northeast corner of Section 12, T11N, R30E; thence south along the section lines twelve miles more or less to the southeast corner of Section 1, T10N, R30E; thence west two miles along section lines to the southeast corner of Section 3, T9N, R30E; thence north one mile along section lines to the northeast corner of Section 3, T9N, R30E; thence west along section lines three miles to the southeast corner of Section 31, T10N, R30E; thence north two miles along Highway 395 to the intersection with the Selph Landing Road near the northeast corner of Section 30, T10N, R30E; thence seven miles west along Selph Landing Road to the northwest corner of Section 30, T10N, R29E; thence north along section lines and portions of Fraser Drive until the intersection with Road 68, thence northwesterly along Road 68 until its intersection with the Esquatzel Channel; thence west along the Esquatzel Channel until its intersection with the Columbia River; thence northwesterly along the Columbia River to the Grant-Franklin County line at the north section line of Section 29, T14N, R27E; thence east along the Grant-Franklin County line four miles more or less to the northwest corner of Section 30, T14N, R28E; thence north along the Grant-Franklin County line four miles to the point of beginning.

(b) Also including Levey (Ice Harbor Dam area): This area includes all lands lying within a two-mile radius of Levey within Franklin County.

(2) Area 1 restrictions.

(a) The use or application of low volatile formulations of use restricted herbicides is prohibited on and after April 5th through October 31st of each year: Provided, That low volatile ester formulations of 2,4-DB may be applied to alfalfa and red clover seed crops on and after November 1st through April 30th of the following year.

(b) Ground applications of use restricted herbicides on asparagus shall conform to the manufacturer's specified combination of nozzle type/size and pressure in pounds per square inch (psi) at the nozzle that produces a spray droplet size that falls within the coarse (or larger) range as defined by the ASABE standards.

(c) On and after April 5th through October 31st, aircraft applications of use restricted herbicides are prohibited except by written permit issued by the department: Provided, That on and after November 1st through April 4th of the following year, aircraft applications of use restricted herbicides are allowed when the application conforms to the manufacturer's specified combination of nozzles, pressure (psi), plates, nozzle orientation, and aircraft speed that produces a droplet class that falls within the coarse (or larger) range as defined by the ASABE standards.