Reading between the lines on the GARS website, this appears to be thanks to irresponsible operating by some previous visitor(s). A similar situation exists in Andorra, where it is now extremely difficult to get a visitor’s licence for any band.
73,
Walt (G3NYY)
Many innocents suffering penaltis for some few other’s faults. As usual…
Do you think the MT hasn’t?
Because he’s in Gibralter. 
Do pay attention at the back please! 
The MT have emailed him. He may well have a licence that allows HF. The various websites suggest this is not possible but that does not mean the licensing body has not changed the licence and it is now possible. Should it turn out it is valid then it is fine. If it was a simple mistake (which we all make) such as failing to notice the no HF then HB9EIZ will remove his log. He may be embarrassed at making such a mistake but it’s not the end of the world. If we hear nothing then I will fire up my DB admin console and zap it and all the logged chases.
I have added clarifying text to the Summits Page from the regulatory body and the local club/IARU society.
73 Ed.
Walt, you are right. GRA have confirmed that the reciprocal licences they issue use the “ZB2/” prefix.
But the “no HF” restriction stands. So we should not expect to see “ZB2/” on anything other than 70cm, 2m, 4m or 6m.
He has logged his activation onto the SOTA Database already.
Jimmy M0HGY
I know. That’s why I said I will zap it if I need to.
But unlike some places, where people have their valid logs deleted with no explanation. we (the MT) are giving him the chance to reply. Until he has had that chance to explain that it was a mistake or he has a licence valid for HF then the log stands.
That’s fair enough Andy.
Jimmy M0HGY
Let’s hope Markus is not sat in Gibraltar Jail for smuggling radio gear, which can happen if he is stopped at the border without a Gibraltar radio licence (seriously).
Ed.
I can remember getting the 12m band edge wrong and calling CQ SOTA about 5kHz out of band. Boy was I feeling dumb when I spotted a spot comment saying I was out of band for the US. I couldn’t understand this because 3 or so people had chased me already. I think they had blindly tuned to the spot frequency and went from there. When I saw the comment. I QSY’d up the band and got plenty more chasers. Yes, I broke the UK Wireless Telegraphy Act by being careless but nobody died… the world kept turning and the sun continued to rise each morning in the East.
It’s easy to make mistakes and the general excitement of a SOTA expedition makes it even easier to make mistakes.
I agree this illegal operation was obviously an oversight from Markus, however the risk of having equipment confiscated and suspecion of smuggling when crossing the Spain/Gibraltar border with radio gear and no valid Amateur radio (Gibraltar) Licence - is real - it is documented on the GARS website. Gibraltar Amateur Radio Society
Lets hope the HF operations didn’t interfere with the UK Forces operation on the rock of Gibraltar - it’s unlikely at the powers and antennas that we run.
I remember once (several years ago) I spent a very uncomfortable 10 minutes with the Spanish Customs at Malaga Airport. I was carrying a Yaesu FT901DM transceiver and was on a direct flight from London to Gibraltar. Due to bad weather at Gibraltar, the flight was diverted to Malaga and all the passengers were dumped off at Malaga Airport for onward transportation by bus to Gibraltar. This was in the days before Spain was a CEPT signatory, so I would have needed a Spanish reciprocal licence to bring the transceiver into Spain. I did not have one. And there were Customs complications as well. 
The Customs Officer was not best pleased, but eventually let me go, muttering “No es correcto!!!”
Is this a foretaste of what we may have to expect when the UK leaves the EU?
P.S. As I was walking away, I noticed that the passenger behind me had opened his brief case to reveal about 200 BNC connectors in cellophane wrappers. I did not hang around to see what happened to him!
73,
Walt (G3NYY)
No. We are leaving the EU not CEPT.
Quite so. Therefore there could be serious Customs implications when taking radio equipment abroad.
73,
Walt (G3NYY)
Unlikely.
Take EA8. Part of the EU. Except it is and isn’t. Politically it is but it is outside of the EU customs arrangements. That’s why they do have real duty free in their airports and you are limited to 1L of spirits per person when returning to the UK.
EA8 as part of Spain is part of CEPT. There is no customs problem taking radio equipment out of a non-EU customs area (EA8) in to the EU customs area (UK) at present. There should be no problem taking radio equipment out of a non-EU customs area (UK) in to the EU customs area (DL say) in 2019.
Not the best example. EA8 is not member of EU VAT System, but it is member of EU Customs Union.
Despite being members of Custom Union, some countries retained the right to regulate cross-border trade of some goods that they keep monopoly on (e.g. tobbaco, alcohol) or in some other way (e.g. cars).
In my opinion Walt’s fear is founded, just don’t believe that customs officers will bother for clearly used stuff (I have some experience with that from before 2004 when S5 joined).
To be honest, from what I saw in this thread, I had no idea.
Great. thank you for info.
Sounds good to me.
Only if he had no valid license, which we still do not know for sure. Of course there are some strong indications that this was not the case.
You’re correct. I should know to check “facts” from Wikipedia! Looking at this there a plenty of the sites saying it isn’t and more saying it is but there some Canary Islands government sites that explain the actual picture. The tax laws explain why I can buy a bottle of Scotch Single Malt from the duty free shop for a 1/2 the price it costs in the UK even allowing for the fact it’s been shipped 3000km!