19. If one who needs to say Yizkor is in a place where there is no minyan, he can nevertheless say it alone1.

20. Whereas in Eretz Yisrael one may not sit in a sukkah on Shemini Atzeres, in the diaspora, some are accustomed to do so, due to Halachic considerations concerning the calendar setup in the diaspora.

Thus, a native of Eretz Yisrael who is spending Sukkos outside of Eretz Yisrael and who is being hosted by one who eats in a sukkah on Shemini Atzeres, should accompany his host, but have in mind that he is not doing this for the mitzvah.

Additionally, he should also discreetly eat some food outside of the sukkah and avoid, through some excuse, sleeping in the sukkah that night2.

However, concerning a visitor to Eretz Yisrael, there are various opinions. According to some authorities, notwithstanding the discomfort of being alone in the sukkah, he should nevertheless at least eat his meals in the sukkah. According to other opinions it would not be necessary under these circumstances to be in the sukkah at all on Shemini Atzeres3.

21. A resident of Eretz Yisrael spending Simchas Torah in the diaspora should not be honored with Chasan Torah or Chasan Bereishis. Neither should he be given any of the other aliyos (including maftir). However, a visitor from outside of Eretz Yisrael spending Shemini Atzeres in Eretz Yisrael (which in Eretz Yisrael is also Simchas Torah) is permitted to receive the abovementioned honors4.