Several amendments have already been tabled and accepted, including a restriction on walking at night, and Tory peers are reported to be planning a further series of "wrecking amendments" to delay the passage of the bill still further.
The first of its kind in the country, the restriction has sparked reaction from pizzeria counters to late-night talk shows, celebrated by some as a bold attempt to improve people's health and derided by others as another "nanny state" law from Bloomberg during his 11 years in office.