def METHOD_NAME(cls, mine_region_code, is_major_mine=None):
    general_contacts = cls.find_EMLI_general_contacts()
    mmo_contact = cls.find_major_mine_office()
    if is_major_mine == True:
        return cls.query.filter_by(
            mine_region_code=mine_region_code,
            is_major_mine=is_major_mine).filter_by(deleted_ind=False).union(mmo_contact).all()
    elif is_major_mine == False:
        return cls.query.filter_by(
            mine_region_code=mine_region_code, is_major_mine=is_major_mine).filter_by(
                deleted_ind=False).union(general_contacts).all()