Gardaí want signs outside abortion clinics so officers know if a safezone area is being broken.
They say there should be no ambiguity on where it starts and ends.
TDs and Senators are hearing today about how the 100-metre zones free of anti-abortion protests can be practical.
Garda Deputy Commissioner Anne Marie McMahon says there are many technical issues:
"The definition and parameters are important but it's the practicalities of these locations.
"They're not universal in how they're constructed, there's different access areas, they could be in the middle of a shopping complex, there could be other services there.
"There are all sorts of complexities around the practical application of this".