Leicester and Trailfinders are the most recent clubs to enter the PWR three years ago when they joined Gloucester-Hartpury, Bristol, Sale, Exeter, Saracens, Harlequins and Loughborough in the top tier.
All are supported by men’s Prem sides apart from Trailfinders, who are linked to Champ side Ealing.
Clubs across the UK and Ireland have until 30 April to submit their interest, after which PWR says decisions will be made on whether any further discussions should take place.
Expansion of the league for 2026-27 had previously been ruled out but beyond that the PWR said the future is undecided.
New clubs as well as existing franchises are eligible to get in touch however they must meet a number of criteria.
This includes being able to invest at least £1.2m annually in their rugby programme, be able to field a squad of 45-55 players and provide facilities that meet PWR competition, broadcast and training standards.
Of the 10 men’s Prem teams, only reining champions Bath and Newcastle Red Bulls do not have a top-flight women’s side.
Bath chief executive Tarquin McDonald said in November that the club were having “collaborative” conversations with the PWR about a women’s team one day joining.
As part of changes voted through by the Rugby Football Union to the Prem last month, which saw promotion and relegation from the league scrapped, any club looking to join the men’s top tier in future will need to show their commitment to the women’s game in order to be considered.
