is this Entity Relationship (ER) diagram correct?

[ericsermon]

Hi,

I saw a few posts on here about E-R diagrams and would be very grateful to anyone who can help me out.

I have a entity relationship diagram, the following conditions have to be satisfied/are true:

• each tenant can rent a room in a hall of residence OR apartment.
• lease agreements are made at the start of each year.
• (hall of residence = 1 person to each room)
• (apartment = 3 people to each room)
• apartments are inspected by a accomodation officers (members of staff)

I've attached the image, but just in case heres the link:

http://imageshack.us/f/15/erdiagram.jpg/

Is the diagram correct?

thanks
ES