Until its repeal, most extensions to copyright law were based around provisions found in the Statute of Anne. The one successful bill from the lobbying in the 1730s, which came into force on 29 September 1739, extended the provision prohibiting the import of foreign books to also prohibit the import of books that, while originally published in Britain, were being reprinted in foreign nations and then shipped to England and Wales. This was intended to stop the influx of cheap books from Ireland, and also repealed the price restrictions in the Statute of Anne. Another alteration was over the legal deposit provisions of the Statute, which many booksellers found unfair. Despite an initial period of compliance, the principle of donating copies of books to certain libraries lapsed, partly due to the unwieldiness of the statute's provisions and partly because of a lack of cooperation by the publishers. In 1775 Lord North, who was Chancellor of the University of Oxford, succeeded in passing a bill that reiterated the legal deposit provisions and granted the universities perpetual copyright on their works.