Public limited Company can appoint 3 more directors directly as a regular director,if you are appointing them through AGM , however you can appoint them through Board Meeting as a Additional Director to hold the post of Director up to coming AGM .
If you are appointing them through AGM you are required to file form 32 as Director.
but if you are appointing them as additional director you need to file form 32 twice first within 30 days of passing Board Resolution for appointment as additional Director, second, as appointment of regular Director within 30days of AGM .
In AGM you can pass ordinary resolution hence no need to file form 23 , but as it is special business, provide explanatory statement in AGM notice regarding regularasation .
As per my knowledge section 263 a motion shall not be made for the appointment of two directors through single resolution ,hence you can pass two different resolution for two directors in the same meeting.
If you want detail checklist for appointment of directors I will post same afterward .
regarding rotational Directors you have to pass resolution in AGM that these directors are eligible for retire by rotation hence retired and can be reappointed through same meeting
If you are reappointing them no need to file form 32 but if they are not getting reappointed then you have to file form 32 for their retirement.
I am not getting you point regarding " 1direcor is non-rotational " so I am not able to provide clarification on that point .
Regards , Ms. Gargi