UK Borders Bill

I raise a point about Amendment No. 16 which I hope that the noble Baroness, Lady Anelay, has not already covered while I was briefly out of the room. Paragraph (k) refers to the Secretary of State requiring the ““surrender of other documents””. ““Other documents”” is not explained, even in the Explanatory Notes. Does it include passports held by non-nationals which are still valid? If they are included and the Secretary of State acts on this, people could be left in a position of quasi-statelessness in this country, which would prevent them travelling to other countries.