Subtract any income or gain of an enrolled member of the Mashantucket Pequot Tribe who resides in Indian country of such tribe or any income or gain of an enrolled member of the Mohegan Tribe who resides in Indian country of such tribe where the income or gain is derived from or connected with Indian country of the tribe. Enter the words "Mashantucket Pequot Tribe enrolled member" or "Mohegan Tribe enrolled member," as the case may be.