On an IFR Low Altitude Chart what does this symbol mean? I read the information below in the aeronautical chart user's guide. I have several questions. 


On the third line - Why is there an ICAO identifier for a U.S. &amp; Alaska low altitude chart? I thought ICAO was for international flying? 
On the fourth line it says '0' and '*' but there is no explanation. What do these two symbols mean? 
On the fifth line it says there is a part time frequency, I assume because the tower is part time based on line three. So if this is the case, why does it need to say part time twice?




CITY - City

Airport Name - Airport Name

(APT) (ICAO) [D]* - Airport Identifier, ICAO Location Identifier, Class D airspace with far 93 special requirements operating part time 

280 0* 43s - Airport elevation, unknown symbol, runway length (soft field)

(A) *109.8 - ATIS, Part Time Frequency
① - ICAO ID

As indicated, will be used for OCONUS airports only (overseas), e.g. Guam has a 4-letter ICAO designator:



② - Symbol with circle: Lighting


  An "L" following the elevation under the airport name means that
  runway lights are on during hours of darkness. A circle around the "L"
  indicates there is Pilot Controlled Lighting. A star beside the "L"
  means the lighting is less than continuous.


(Source)

This is part of the legend, but there is no lead line.

③ - ATIS available part-time

This is not the tower frequency (as your question seems to assume), but the ATIS frequency.

This information is not redundant, the ATIS may be available full time for an airfield open part-time. This is the case for Grand Junction Regional in the snapshot above.