Complex sentence: No transfer fee was necessary, as the young defender was under age, however it was declared by the KNVB, that Bazoer would not be eligible for the first team of Ajax until after his 16th birthday.
Split into simpler sentences: No transfer fee was necessary, as the young defender was under age. However it was declared by the KNVB that Bazoer would not be eligible for the first team of Ajax until after his 16th birthday.