This means the Blues will be turning their attention to bringing in players aged 24 and under, with the best years of their careers ahead of them, and a profit likely to follow similar to those received for Matt Clarke and Jamal Lowe.
In January, 23-year-old Denver Hume was recruited from Sunderland for a fee in the region of £200k and was one of the first to be brought in under the new policy.
Here, we take a look at the 15 top-ranked under-24-year-old’s from League One and League Two who Pompey could realistically target in the summer from WhoScored’s player ratings.
Here are the options Danny Cowley could be presented with.
A message from the Editor, Mark Waldron
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13. Antony Evans - Bristol Rovers
Position: Attacking midfield Age: 23 Appearances this season: 22 Goals: 6 Assists: 6 Contract: Expires at the end of the season Average Rating: 7.25 Photo: Alex Burstow
14. Ross Sykes - Accrington Stanley
Position: Centre back Age: 22 Appearances this season: 28 Goals: 2 Assists: 4 Contract: Expires at the end of the season (with club option) Average Rating: 7.35 Photo: Charlotte Tattersall
15. Kane Wilson - Forest Green
Position: Right-back Age: 21 Appearances this season: 30 Goals: 3 Assists: 12 Contract: Expires in the summer Average Rating: 7.47 Photo: Pete Norton