contractors and subcontractors on public buildings or work...-----.

173-177

wage rates, procedure for predetermination____

Reimbursement. (See Payment to State for construction.)

169-172

Secondary systems. (See Federal-aid system and Federal-aid second-

ary system.)

Secretary of Agriculture:

forest development roads and trails.

forest highways----

Secretary of Army: bridges over navigable waters__.

Secretary of Commerce:

appalachian regional development__.

definition

134

40

13

12

13

323

31-33

31, 32, 114
131-139

268, 269

4

43

rules, regulations, recommendations___.

Secretary of Defense: defense access roads (see also Access roads).
Secretary of Interior:

Seven percent system-----

Rama Road__

Services to other Federal and State agencies and foreign countries____.

Signs. (See control of outdoor advertising.)

38

41

5

Small business enterprises----

40

Specifications.

(See Plans, specifications, estimates, surveys.)

Standards:

acquisition marginal land, condition precedent, prohibited___
approval-plans and specifications__

approval, require before: