Yes. You must register and activate a user name and password for each system.

Yes, you can download information for your files. However all files will be stored indefinitely and can be accessed at any time, so you don't have to download them unless you choose to do so.

Yes. Modifications can be issued as long as they are within scope of the initial order. In general, if the modification does not change the nature of the work and was within the contemplation of the parties when the order was formed, the modification falls within scope of the initial order.

Yes. All eligible contract holders see the questions and answers once they are released by the government. Any question(s) not answered by the government are not viewable by the contract holders.