49-7A-6.1 Operator not to be billed when location of excavation on notice differs from location of operator's facility. 49-7A-7 Duties of one-call notification center. 49-7A-8 Location of underground facilities--Marking. 49-7A-9 Failure to provide timely location markings--Inadequate markings--Liability. 49-7A-10 Liability for damage to underground facility. 49-7A-11