I suspect that Spanish string should adhere to EU directives on acceptable length, but does it?
Only if the local mayor gives his agreement. Even then, the provincial government will come in after 5 years and declare it illegal and the string will have to be removed or demolished. The local MEP will then brand this a disgrace but will be ignored by all and sundry, as usual.
Expats having bits of string within 100 feet of the beach will start worrying and fill up chat sites about it.
Normansands will start a thread (geddit?) on is your string safe in Spain now?
Tish will reply that the freedom to have any length of string in England is perfectly acceptable as you can trust the solicitors there.
Georgia will try and sell you a two tier piece of string in a legal location.
Morerosado will post 15 pictures of various sized bits of string, some with fireworks exploding behind them.
Camposol will complain that the British are leaving bits of string all over the place and not declaring them to the authorities.
Technoape will tell you all how his bit of string is far stronger than anything he had in UK and, anyway, it's much more relaxing looking at a piece of string in the sunshine and has less chance of being stolen or vandalised than it would have in Devon.
Max Kite will give you the name of at least 3 banks that will give you a mortgage to buy your own piece of string whilst pointing out that the value of it will go down 90% the day after you bought it.
Finally, ads will come on and tell you all how many abandoned pieces of string are being left around thus causing the Spanish national debt to rise as no one is paying SUMA on it and Goodstitch will remind you all that the bank guarantee you got on the piece of string is worthless when the newsagent you bought it from goes bust.
Oh, and I'll tell you all how you can register your piece of string with the local medical centre.