Split and simplify the following sentence while retaining its full meaning: Member States shall check whether the undertaking referred to in Article 3 ( 2 ) has been fulfilled , by periodic on-the-spot inspections in such a way that each holding is inspected at least every five years .
 Simplified version:
Member States shall ensure that the commitment referred to in Article 3 ( 2 ) is fulfilled . To this end , they carry out regular on-the-spot checks in such a way that each holding is inspected at least every five years .