Eligibility.  All radio amateurs in the United Kingdom of Great Britain and Northern Ireland, and the Channel Islands are eligible to activate in the event. All activators must operate within the specific conditions of their licence.

Activation Zone. All activations must be within 1000m (1km) of the bunker location given in the UKBOTA list. 

Large Square. The Large Square being activated is the Large Square the activator is activating from. In most cases this will be the same Large Square as the bunker is located, however, where a bunker activation zone overlaps with a Large Square boundary it is important to check the correct Large Square is used. The same bunker cannot be activated from 2 different Large Squares HF, or two different  Large Squares on VHF even if the activation zone covers more than one Large Square. However, it could be activated in one square on HF, and different square on VHF if the activator was to move location.

Exchanges.  An exchange is valid if signal reports and an acknowledgement are received in both directions. It is not necessary to exchange the bunker reference(s) and Large Square in each QSO and is a matter of judgement for the activator regarding how often that information is repeated.

Valid activations. For an HF activation to be valid a minimum of 25 stations must be worked, for VHF the minimum is 10 . HF QSOs with the same hunter but on  a different HF band count as an additional valid QSO for the HF activation. VHF QSOs with the same hunter but on  a different VHF band count as an additional valid QSO for the VHF activation. For the purposes of this event the VHF bands are 6M, 4M, 2M and 70cm. Additional QSOs with the same hunter on the same band but using a different mode (eg. SSB and FT8) do not count as an additional valid QSO. Each UKBOTA bunker may only be claimed once on HF and once on VHF during the event. A valid QSO can be gained by working another station within the same activation zone but in accordance with general UKBOTA rules this is not a valid Bunker to Bunker (B2B) QSO. (Rule change, 10 QSO required for VHF activation, as per Bunkerteer Award).  If you activated a bunker on more than one band on HF you can enter any HF band you activated on in the tracker, it is not necessary to work all (minimum) 25 QSO on that band. 

Return visits. Return visits to the same bunker are permitted, for additional QSOs, within the month of March, if the bunker is not a valid activation (25 QSO Points HF / 10 Points VHF) on the initial attempt(s). For return visits the date of the first attempt should be recorded on the tracker (if the tracker is being used). QSOs on return visits may include those with the same hunter already worked at the same bunker on earlier attempts.

Safety and right of access.  UKBOTA accept no responsibility for the safety of activators. All activators are to take personal responsibility to ensure that their activation is safe. Publication of a bunker reference does not in any way infer a right of access to either the bunker site or anywhere within the activation zone. When there is any doubt about right of access, or the legality to operate, the activator is advised to seek advice from the landowner or their nomimated representative before embarking on an activation.