Passage: Kiyomizu-dera was founded in the early Heian period.  The temple was founded in 778 by Sakanoue no Tamuramaro, and its present buildings were constructed in 1633, ordered by the Tokugawa Iemitsu. There is not a single nail used in the entire structure. It takes its name from the waterfall within the complex, which runs off the nearby hills. Kiyomizu means clear water, or pure water.It was originally affiliated with the old and influential Hossō sect dating from Nara times. However, in 1965 it severed that affiliation, and its present custodians call themselves members of the "Kitahossō" sect.

Question: In what year did they sever their affiliation with the Hosso sect?
1965