Is it sufficient for requalifications to carry out cleanroom classifications and filter integrity (sterile operation) once a year in accordance with the current ISO 14644 or do shorter intervals (e.g. in accordance with PIC/S PI 032-2) of 6 months apply?

Is it sufficient for requalifications to carry out cleanroom classifications and filter integrity (sterile operation) once a year in accordance with the current ISO 14644 or do shorter intervals (e.g. in accordance with PIC/S PI 032-2) of 6 months apply?

According to the standard, once a year is sufficient. Unless your process and SOPs require shorter intervals.