I believe this might be talking about getting an ARIN reservation, as elsewhere it is mentioned that it is not cheap and points to the ARIN fees page. The list

I believe this might be talking about getting an ARIN reservation, as elsewhere it is mentioned that it is not cheap and points to the ARIN fees page. The list of ARIN requirements includes: "You plan to immediately be multi-homed". So you're going to need to be connected to multiple ISPs that will talk to you via BGP would be my assumption.