As I understand it the minimum requirement is that you assess your Reception children against the FSP so that you can return your results to the LA. You may be asked to provide some detail as to what progress the children made from their start point in Reception to their final scores at the end. As the FSP is changing anyway you will need to assess differently next year. What guidance can you get from others in school as to what the Head's expectation is? What have they done in the past? Has it been good enough or is there a requirement to improve on past practice? I'm sure other Tessers will be able to advise you in more detail.