In September 2011 the United Nations held a Summit on NCDs, its second health-related summit after its 2001 meeting on HIV/AIDS.
The move was one of a series of measures agreed at a summit on human trafficking held in Edinburgh.
The Times said Mr Baker - who chaired a summit on the issue on Thursday - had suggested that licensing was one way of controlling the proliferation of "head shops".
Next spring Obama is planning a summit on nuclear proliferation.
NEXT week, European Union leaders gather in Brussels for a summit on the economy.
Later that year, Arizona officials held a summit on the topic, attended by roughly 300 people.
President Barack Obama is hosting a summit on "fiscal responsibility" today.
Clegg will host a summit on the issue later in the year.
This week, the Nassau County executive, Tom Suozzi, convened a summit on the heroin crisis.
Sainbury's, the UK's third-largest supermarket, is holding a summit on the issue in June.
The EU will hold a summit on tax evasion on 22 May.
