I am the sheet music manager of WIMA.
Are you aware of the copyright conditions of WIMA, http://icking-music-archive.org/scores/Introduction.html#copyright ?
According to the these conditions you must obtain explicit permissions from the editors of WIMA scores to redistribute their scores elsewhere. In this case you should contact Pierre Gouin, the editor of Deuxième Récréation de Musique and ask him for permission to distribute his edition in IMSLP. You'll find Pierre's email address in WIMA's Jean-Marie Leclair web page, http://icking-music-archive.org/ByComposer/Leclair.php
Regards -- Christian Mondrup, Sheet Music Editor WIMA: Werner Icking Music Archive http://icking-music-archive.org/