Conservative candidates, nervously eyeing their UKIP rivals, are wondering how far they can go in expressing their Eurosceptic credentials, in the hope that they will be given a clear run.
Enough of the more dutiful (and less secure) candidates have been contacting "them up there" with requests for guidance that the party machine has been moved to issue a stern directive in an attempt to hold the line.
In uncompromising terms, the missive tells candidates:
Here is our line on Europe. You must stick to it. It is our policy and we know that these words strike a chord with the electorate. There is no need to "improve" on it. It is robust, clear, tested, defendable and right. Stick to it.*The missive then goes on to set out policy, telling candidates that: "People face a clear choice: powers brought back from Brussels and no euro with the Conservatives, or more powers surrendered to Brussels under Mr Blair and the Liberal Democrats."
"Conservatives," it continues, "believe in a Europe of nation states, not a country called Europe. We will set a date for a referendum on the European Constitution as soon as we are elected, we will hold it within six months, and we will campaign actively for a 'no' vote."
"We will bring back powers from Brussels, including control of our employment laws and fishing grounds. We will negotiate with our European partners for a 'live and let live' Europe of co-operating nation states. We will not join the euro."
This is actually further than the manifesto, but the message is clear: that's as far as you go chuck… you will not say anything more.