Colin Slade -- capped 21 times by the All Blacks -- is under contract with Pau until 2020 (AFP Photo/NICOLAS TUCAT)

Pau (France) (AFP) - Ex-All Black fly-half Colin Slade will not play for his French club Pau until at least May 20 after suffering three head knocks since August, the Top 14 side announced Thursday.

Pau said in a statement that it wanted to take a zero risk policy with Slade, a two-time World Cup winner with New Zealand.

The 29-year-old, capped 21 times by the All Blacks and under contract with Pau until 2020, suffered head knocks last August, again in December and finally on March 4.

Should Pau, currently fifth in the Top 14, make the top six and qualify for end-of-season play-offs, which start on May 20, then the club would be in a position to call up Slade.