60-2-141. Use of Montana-made wooden materials in highway and road projects. Unless prohibited by federal law, all contracts let by the commission for the construction or reconstruction of the highways and streets located on highway systems and state highways as defined in 60-2-125, including portions in cities and towns and all contracts entered into under 7-14-4108, must use Montana-made wooden guardrail posts, fenceposts, signposts, and decking when appropriate and when the cost of wooden materials is less than or equal to the cost of other materials.