In the State of California: Butte County, Colusa County, Glenn County, Sacramento County, Sutter County, Tehama County, Yolo County, Yuba County.

Shasta County—that portion of Shasta County which lies west and south of a line described as follows: Beginning at the Shasta-Siskiyou County boundary and running south along the range line common to R. 2 E. and R. 1 E., Mt. Diablo Base and Meridian, to the southwest corner of T. 35 N., R. 2 E.; then east along the township line common to T. 35 N. and T. 34 N. to the northwest corner of T. 34 N., R. 3 E.; then south along the range line common to R. 3 E. and R. 2 E. to the southwest corner of T. 33 N., R. 3 E.; then east along the township line common to T. 33 N. and T. 32 N. to the northwest corner of T. 32 N., R. 4 E.; then south along the range line common to R. 4 E. and R. 3 E. to the point of intersection with the northwest corner of the Lassen Volcanic National Park boundary; then east along the north boundary of Lassen Volcanic National Park to the Point of intersection with the Lassen-Shasta County boundary.

Solano County—that portion of Solano County which lies north and east of a line described as follows:Beginning at the inersection of the westerly boundary of Solano County and the 1/4 section line running east and west through the center of section 34, T. 6 N., R. 2 W., M.D.B. & M., thence east along said 1/4 section line to the east boundary of section 36, T. 6 N., R. 2 W., thence south 1/2 mile and east 2.0 miles, more or less, along the west and south boundary of Los Putos Rancho to the northwest corner of section 4, T. 5 N., R. 1 W., thence east along a line common to T. 5 N. and T. 6 N. to the northeast corner of section 3, T. 5 N., R. 1 E., thence south along section lines to the southeast corner of section 8, T. 3 N., R. 2 E., thence east to the boundary between Solano and Sacramento Counties.