The rotational set-aside obligation referred to in the second subparagraph of Article 7 (1) of Regulation (EEC) No 1765/92 shall be regarded as met where none of the plots withdrawn has been set aside under the special set-aside referred to in Article 2 (6) or under the set-aside referred to in Article 7 during one of the previous five years. However, a plot which has already been set aside may be reused if the producer has no further land available enabling him to comply with the abovementioned period.