; and (ii) (I) during the period beginning on the date the notice is received and ending 30 days after that date, the owner or operator fails to provide to that person a written description outlining improvements that will be made to remove the barrier; or (II) if the owner or operator provides the written description under subclause (I), the owner or operator fails to remove the barrier or, in the case of a barrier, the removal of which requires additional time as a result of circumstances beyond the control of the owner or operator, fails to make substantial progress in removing the barrier during the period beginning on the date the description is provided and ending 30 days after that date. (C) Specification of details of alleged violation The written notice required under subparagraph (B) must also specify in detail the circumstances under which an individual was actually denied access to a public accommodation, including the address of property, whether a request for assistance in removing an architectural barrier to access was made, and whether the barrier to access was a permanent or temporary barrier. (D) Notice specific enough For purposes of this paragraph, the term notice specific enough means notice that allows such owner or operator to identify the barrier to access in question. .