Tory MPs in England and Wales must be kept on a lead and muzzled in public now that a new law has come into effect:
Breeding, selling or abandoning them is also illegal as of New Year's Eve.
Voters who want to keep their Conservative MPs have until the next election to apply to do so before an outright ban comes into effect.
The curbs follow a number of attacks on society, but campaigners insist banning is not the answer.
The government said it had met a pledge to take "quick and decisive action" following a series of attacks, with one woman losing her job after just 49 days
The new guidance does not apply to Northern Ireland or Scotland because the breed does not thrive there.
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