Yup. Meant for people using iBooks Author to upload/submit finished files for sale.
And I can finally, once, say that Apple's legal needs to treat countries differently has actually benefitted Canada. ISBN numbers here, for Canadian-based publishers, are free, handed out by the CISS agency of our Federal government. The US is the odd man out here with private firms in control of the ISBN system for US publishers, many countries offer free ISBNs to publishers set up in them.