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13. Teruma and Maaser:
Shemita produce is exempt from Terumos and Maasros. However, this applies only towards produce that is legally declared Hefker by its owners. However, those products that do not have a Hefker status require separation of Terumos and Maasros. Thus, if the produce of a gentile was finished by a Jew during Shemita, it is required to have its tithes removed. Produce of Shemita which was not freed by their owners is required in having Terumos and Maasros removed from them prior to consumption.
 Michaber 331:19
 Rama ibid in name of Kaftor Vaferach
 Grach Naah