..... If you consult with the Spanish Tourist Office in London their general information sheet states "The use of metal detectors is not allowed unless.........
Well I got news for you Dan: So too could be the same be said of officials here in the USA. If you asked the right one, using the right mental imaging, and got a purist archie who thinks "Arpa" applies to the question. Not saying to "throw caution to the wind", but let's be honest: There's been such answers thrown out there (yes,
even on a country-wide level) when persons went into bureaucracy asking questions. Perhaps the answer gets couched in terms of antiquity laws (as if you're asking to trounce on sensitive monuments). Or shipwreck salvor laws, or ... whatever.
And then once such an answer gets circulated into links or rules compendiums, it's impossible to put to rest. It might even start getting enforced (by police who perhaps would never have cared or given the matter a moment's thought).
True story: I listed a detector sale on ebay once, and .... the winning bidder was in Spain ! I had not specified "USA only", so I was stuck to honor the deal. The buyer pre-paid, sent ample over-seas shipping $, so, I figured I had nothing to loose. As the buyer and I made arrangements for the sale, my curiosity got the better of me:
I sent him the link and said "I thought md'ing wasn't allowed there ?". To which he emailed back and said that such laws IN THEIR CONTEXT are for public land. NOT for private land. So they (much like 99% UK hunters) simply hunt private land with permission (fallow ag fields, etc...) . Presto, problem solved. And besides that, they're usually so far back in the forests and mountains that .... quite frankly .... there's no one around to care, to begin with. (his words, not mine )