Conditional Dashas
Besides the general purpose dashas, Parashara has provided a number of Dasha systems that are only applicable for those that have some specific feature in their chart.
Ashtottari dasha | Rahu should not be in the Lagna, and it should be in a Kendra or Trikona from the Lagna lord. Birth during day-time in Krishna Paksha or night-time in Shukla Paksha. |
Shodsottari dasha | The Lagna should be in the Hora of the Moon if the Moon is waning, and should be in the Hora of the Sun if the Moon is waxing. |
Dwadashottari dasha Panchottari dasha Shatabdika dasha Chaturashiti sama dasha Dwisapti sama dasha | The Lagna is in the Navamsha of Venus. The Lagna is Cancer or the Lagna is in Cancer Dwadasamsa. The Lagna is Vargottama. The lord of the 10th is in the 10th. The lord of the 1st is in the 1st, or the lord of the 1st is in the 7th. |
Shastihayani dasha Shat-trimshat sama dasha | The Sun is in the Ascendant. Birth during the day and the Lagna in the Hora of the Sun, or Birth during the night and the Lagna in the Hora of the Moon. |
Tara dasha | There should be Grahas in Kendras. |
All conditional dashas are Graha based (vs Rashi based) and all except Tara dasha are nakshatra based.