(a) At any site where any person or equipment may possibly come within dangerous proximity of a high-voltage line, such approach shall not be made until the following procedure has been complied with:

1. (1) The employer, contractor or other person making such approach or who is responsible for such activity, shall promptly notify the owner or person in charge of such high-voltage line in writing at least five normal work days before such approach is to be made. If the notification is made by regular mail, three extra days notice shall be given. Exception:

   Exception:

   In any emergency situation involving imminent danger to the life, health or safety of any person, the person responsible for such activity is not required to comply with this provision.

2. (2) Within three normal working days following the receipt of such written notice, the owner or person in charge of the high-voltage line shall respond to the person making such approach or who is responsible for such activity of the procedure to be followed prior to performing any work in dangerous proximity to such high-voltage line.
3. (3) The owner or person responsible for the high-voltage line shall perform all necessary precautionary actions to be taken to protect against the danger from contact with such high-voltage line, either by de-energizing such high-voltage line and grounding it where necessary, or by approving in advance other effective methods or devices for the particular cases and for the particular locations.
4. (4) The employer, contractor or other person responsible for the activity within dangerous proximity of such high-voltage line shall be responsible for all costs incurred in connection with such precautionary action including determining what precautionary measures are necessary and preparations for implementing them whether or not such precautionary measures are actually implemented.