Hearts' return to cold storage has been blamed on amateur sides flouting strict rules imposed by the Scottish Government.
The Jambos have been left seething after their preparations ahead the start of the Scottish Championship season were halted by SFA and SPFL joint response group.
They have now been sidelined until at August 24 at the earliest with boss Robbie Neilson slamming the lack of clarity on offer as his plans ahead of the October kick-off were thrown into chaos.
Ill-feeling over the dramatic decision continued to fester on Friday with English League One Hull City training at Edinburgh's Oriam while Hearts sit on the shelf.
And now the Daily Mail have shared a letter from SFA chief executive Ian Maxwell where he points the finger of blame at non-professional teams in wake of the training KO.
The SFA chief executive said: "This understandable requirement from ministers and clinicians means that, in practical terms, all organised adult football over the age of 18 must stop immediately. This pause is regrettable but essential and will apply at least until 24 August, by which time Scottish Government may issue updated guidance in relation to sport as per its route map out of the crisis.
"While the recent breaches have been high-profile and well documented, we are also aware anecdotally of non-professional clubs who appear not to be operating in full compliance with the government guidance and suspension of football. The rules are clear and we simply cannot and will not tolerate any subsequent failure to adhere to them by any club.
"While I understand the frustrations of being denied the opportunity to take part in the sport we love, the First Minister could not be clearer that Scottish football has been issued a yellow card.
"Any further breaches will almost certainly result in a shutdown of the game."
Meanhwile, Record Sport also understands Hearts asked if they could head to England if they weren’t allowed to use their own training base, but were told no.
A Scottish Government spokesman said: “English teams must follow stringent guidance and testing protocols, governed by the UK Government and the English FA.
“Under the Resumption of Performance Sport Guidance, outdoor contact training and indoor non-contact training is permitted for professional athletes at agreed venues – providing full risk assessments of both the venue and the incoming users has been done and approved by the Scottish Institute of Sport.”
