It is estimated that some 90,000 hire cars will be available this summer.
"If they were obliged to pay road tax, which at the moment they do not, then there wouldn't be the problem that we have."
It is estimated that some 40% of hire cars "left" the Balearics and were registered on the mainland.
There were more in the first nine months of this year (10,367) than in the whole of 2015 (8,030).
According to tourism ministry figures, there are 9,175 authorised holiday rentals' properties in Majorca. Of these, only 5,968 met the deadline.
The annual overnight walk from the Plaça Güell in Palma to Lluc will start at 11pm on Saturday, 13 August.
Currently, there are 53 hotels with all-inclusive offer registered with the ministry, when the number is very much higher: 297 in total.
“The administrations must take measures against companies that operate in a pirate manner this summer by not being officially registered.”
The average daily rate of online registrations by Britons abroad has quadrupled from an average of just over 600 per day before the announcement of the referendum date.