Intact versus broken cement products
The line between regulated and unregulated is the condition and handling of the material. Siding that is sound and untouched is not regulated asbestos-containing material. The same siding becomes regulated once it is cut, abraded, broken or demolished, and then containment, wet methods, notification at the quantity thresholds and licensed transport apply.
Exterior material is worth testing at the planning stage, before the schedule is set. Cost follows the wall area, how many layers are involved, access around the house, and the waste class.
If the siding is coming down with the building, see asbestos abatement before remodel or demolition for the order of survey, J# and permit. The Hayward Asbestos Removal homepage covers the other materials.