is attestation of documents required at the time of submission of forms or self attested documents are enough?

Are online admission forms available for all the schools in delhi or only selected schools have this facility?Also, are the opening and closing dates for admission forms same for all the schools or it varies from school to school?

Will be highly grateful for an answer.

Are online admission forms available for all the schools in delhi or only selected schools have this facility?Also, are the opening and closing dates for admission forms same for all the schools or it varies from school to school?

Will be highly grateful for an answer.