The management regulations § 39

§ 39 Well programme in the event of labour disputes

The operator shall, no later than seven days after a notice of collective work stoppage is given, submit to the Norwegian Ocean Industry Authority an overview of ongoing and planned drilling and well activities that could be influenced by a labour dispute.
The operator shall have a programme available for plugback of the relevant wells, cf. also Section 88 of the Activities Regulations, within four days after notice of the final extent of the collective work stoppage is given. The programme for plugback shall be discussed with the employees' elected representatives.
An overview of consequences of the well-securing work that may be implemented as a result of the labour dispute shall be submitted to the Norwegian Ocean Industry Authority within four days after notice of the final extent of the collective work stoppage is given.
Section last changed: 01 January 2011

The requirement means that the operator shall not plan for an emergency shutdown, but rather a controlled, temporary abandonment of the well in accordance with the procedures and the programme.
The reason for the deadlines as mentioned in the second and third subsection, is that the operator does not know which personnel will be taken out on strike until the notification of the final extent of the collective work stoppage, and thereby which consequences the strike will have for the activity, and which wells may have to be shut down.