(1) Area 1 description. (An area south of the Yakima firing center including the upper and lower Yakima Valley.) An area starting at the Yakima-Benton County line and the northeast corner of Section 1, T11N, R23E; thence west along section lines seventeen miles more or less to the southeast corner of Section 31, T12N, R21E; thence north eight miles along section lines to the northeast corner of Section 30, T13N, R21E; thence west along section lines eleven miles to the Yakima River; thence northwesterly along the Yakima River four miles more or less to the junction of the Yakima and Naches Rivers; thence northwesterly along the Naches River for seven miles more or less to the northwest corner of Section 31, T14N, R18E; thence south one mile along the section line to the southwest corner of Section 31, T14N, R18E; thence west along section lines six miles to the northwest corner of Section 6, T13N, R17E; thence south twenty-four miles along section lines to the southwest corner of Section 31, T10N, R17E; thence east twenty-four miles along section lines to the southeast corner of Section 36, T10N, R20E; thence south six miles along section lines to the southwest corner of Section 31, T9N, R21E; thence east six miles along section lines to the northwest corner of Section 6, T8N, R22E; thence south six miles along section lines to the southwest corner of Section 31, T8N, R22E; thence east twelve miles along section lines to the Benton County line; thence north twenty-four miles to the point of beginning.

(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: Provided, That low volatile ester formulations of 2,4-DB may be applied to alfalfa and red clover seed crops at any time.

(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) Aircraft applications of use restricted herbicides are allowed only on nonirrigated lands on and after November 1st through April 4th of the following year. Aircraft applications of use restricted herbicides are prohibited on and after April 5th through October 31st: Provided, That hormone sprays may be applied to orchards to prevent fruit drop: Provided further, That aircraft applications are allowed by written permit issued by the Washington state department of agriculture in those dry land wheat growing areas east of Moxee and on the Rattlesnake Ridge and the area south of Horse Heaven Hills Ridge contained in Sections 25, 26, 27, 28, 32, 33, 34, 35 and 36, T8N, R23E up to within one mile of commercial grape plantings and to within one-quarter mile of other susceptible crops.