K.N. Rao has often used the term, "The Great Parashara Exception" when discussing particular debilitated planets. When this exception is evident in the chart he has been known to predict spectacular success for the person while other astrologers have seen periods of failure.
The exception, according to Rao, is that debilitated planets when ruling or located in the 3rd, 6th, 8th or 12th houses form raja yogas, indicating career rise in their dashas or sub dashas. Usually the lords of these malefic houses represent challenges and difficulties. It makes logical sense that they become even more problematic when debilitated, but the reverse is the case.
The classical basis for this rule can be found in several verses in chapter 41 of Sage Parashara's Brihat Parashara Hora Shastraentitled "Raja Yogas" (translated by Girish Chand Sharma):
· If the 6th, the 8th, and the 3rd houses are occupied by debilitated planets, and the ascendant lord is in his own or exaltation sign aspects the ascendant, there is raja yoga.
· If the 6th, 8th, and 12th lord is in debilitation, in an enemy's sign, or combust, and the ascendant lord in his exaltation or in his own sign aspects the ascendant, it causes raja yoga. Verse 20
· It should be known that if even the lords of malefic houses 6, 8 and 12 in their debilitation aspect the lagna, it also causes raja yoga. Verse 28
You will notice that these verses are somewhat different than K.N. Rao's exception as stated earlier. He has extended their meaning to include planets located in the 3rd, 6th, 8th and 12th houses and not just the lords. Often he recommends taking the classical texts "liberally not literally," as he has done in this case.
The verses also include the additional stipulation that the ascendant lord be either exalted or in its own sign, or aspecting the ascendant. In other words, the lagna needs to be strong. In the last verse the lord of the 6th, 8th or 12th should also aspect the ascendant in addition to being in debilitation. These additional factors related to the ascendant should be considered when determining whether a planetary combination falls under "The Great Parashara Exception."