The SPFL have began discussions with all 42 member clubs about potentially introducing concussion substitutes for the rest of the season.
Changes are currently being trialled in League One and Two matches as well as play-off games but clubs in the top two tiers have been asked to provide their own views on whether or not they would support concussion subs.
We told recently how the International Football Association Board approved “extensive trials” for additional permanent concussion substitutes.
Now, the SPFL have confirmed they are waiting on a vote being conducted where they would require 75 percent in favour of the three voting categories from the Premiership, Championship and below.
There is a February 1 deadline.
SPFL chief executive, Neil Doncaster said: “Clearly this is a very important issue and one that Scottish football has led on. We are keen to get input on it from our member clubs as soon as possible.
“The Scottish FA has already indicated its intention to introduce the concussion substitute trial in the Scottish Cup at the earliest possible opportunity and we will be liaising closely with them, and with Dr John MacLean, once our clubs have responded with their views.”