Special Period posting

Hello ,

Please clear my concept:

1. Can I open special period when my normal period is open? e.g. My fiscal year is Jan to Dec (1 to 12) , and current period is 2. So can I open period 13 also.

2. Special period are to be opened only when year closes? Cant we open in middle of year.

3. If normal period 1-12 is closed, then is posting possible in closed period , even if special period is opened?

4. As per my understanding, i can post only in last month via special period? Cant I post in earlier period ? e.g. In my example last period is Dec, so cant I post in Nov via special period?

Please guide,

As there are many confusions.

Regards,