Planets, not including the Moon, Rahu or Ketu, in the 2nd and 12th from the Sun.
"The Ubhayachari native will be a king or equal to a king, happy, talkative and a good speaker. One will be learned, strong, a protector of his kinsmen, a favorite of the government, enthusiastic, very fortunate, firm, and full of everything. He will have many servants and enjoy all pleasures. Even bodied but not very tall, he is very strong. Malefics forming this yoga will give contrary effects."
Ubhayachari Yoga is simply a combination of Vosi and Vesi Yogas. Classical texts also prefer benefics forming Ubhayachari Yoga, rather than malefics:
"One who has Subhayachari Yoga (Ubhayachari Yoga formed by benefics) is a princely individual possessed with corresponding wealth and comforts and beloved for his amiability and compassionate nature. He will have beautiful limbs, be affable in address, though speaking too much. Delighting the world, he is enthusiastic, eloquent, renowned, wise, strong, a leader of men, and dear to the king."