PPL Exams.
From LASORS "An applicant shall be deemed to have successfully completed the theoretical examinations for the JAR-FCL PPL(A) when awarded a pass in all of the examinations within a period of 18 months. A pass will be accepted for the grant of a JAR-FCL PPL(A) during the 24 months from the date of successfully completing all of the theoretical knowledge examinations." You have a year from the skill test pass to have your licence issued or the skill test becomes invalid.
Hope that helps,
Han.