(b) The standard specifications described in subdivision (a) shall allow recycled materials at a level no less than the level allowed in the department’s standard specifications, as those standard specifications may be amended or updated from time to time, for all of the following:

1. (1) Recycled base and subbase materials as set forth in Sections 25-1.02 and 26-1.02 of the department’s standard specifications.
2. (2) Reclaimed asphalt pavement and other materials in asphalt as set forth in Section 39-2.02B of the department’s standard specifications.
3. (3) Reclaimed aggregate, fly ash, returned plastic concrete, and other materials in concrete as set forth in Sections 90-1.02, 90-2.02, and 90-9 of the department’s standard specifications.

(e) For purposes of this section, the following definitions apply:

1. (1) “Department” means the Department of Transportation.
2. (2) “Local agency that has jurisdiction over a street or highway” does not include any special district, any city whose population, according to the most recent census, is equal to or less than 25,000 people, or any county whose population, according to the most recent census, is equal to or less than 100,000 people.