Mekies has agreed to leave Ferrari and join AlphaTauri as its new team principal to replace Franz Tost, who is stepping down at the end of the year.
But no date has been set for Mekies’ arrival as he remains under a long-term contract to Ferrari, so his release needs to be agreed.
Tost himself said the matter would likely be one for Red Bull and Ferrari to resolve.
“First of all, it's between Laurent and Fred [Vasseur]," said Tost about the process of sorting Mekies' arrival.
"Then, of course, Red Bull will take a major role in this. I think that Oliver Mintzlaff [Red Bull CEO] will then talk to the CEO from Ferrari and find a solution."
Sources have suggested that Ferrari could be willing to let Mekies go early if it can get hold of some Red Bull personnel early that it has signed but are currently on gardening leave.
It comes amid rumours that Ferrari has also been trying to poach more senior technical staff from its Milton Keynes-based rival.
Source: Autosport