For each presentation there can only be one “presenting author”. If there is more than one author, you will have to choose one person to present your abstract. The other authors may be mentioned as co-authors.  Co-authors should make passive application or if co-authors want to apply as active participant they should send different abstract. If two people apply with the same abstract, they will be both disqualified.  Also if one person apply with two different abstract again s/he will be disqualified.

Active Participation

Active Participation From

Passive Participation

Passive Participation From