The Lebreton Flats are part of the National Interest Land Mass.

 The National Capital Commission cannot sell, give away or subdivide the Lebreton Flats in Ottawa.

Definition of the NILM - The National Interest Land Mass (NILM) consists of "National shrines, the river and canal banks, the Confederation Boulevard, the Gatineau Park and the Greenbelt in the National Capital Region considered essential to the realization of the Vision of the Capital. There are 37 individual parcels of property in this category currently owned by the NCC totaling some 44,200 ha in area. Land forming part of the NILM will be retained by the NCC on behalf of the government in perpetuity for purposes which lie at the core of the NCC's mandate and will be managed by the NCC with little or no further management by the Treasury Board Secretariat." (Google: 1988-09-15-TB-re-NCC-Land Holdings.)

The Standing Committee on Transport, Infrastructure and Communities. House of Commons Ottawa Monday, October 26, 2009. Evidence. Mr. Jean-Paul Murray (Co-Chair, Gatineau Park Protection Committee): "The government established the National Interest Land Mass in 1988 following a recommendation by the Nielsen Commission that it curtail the NCC and impose a managerial discipline on it and on its real estate transactions."

"In addition, the Auditor General and the NCC Mandate Review Panel emphasized that the NCC was managing the NILM in an ambiguous and inconsistent manner and that the agency should be more transparent in this regard."

"Gatineau Park is the cornerstone of a great memorial dedicated to the 42,000 Canadian soldiers who died defending our democratic values in World War 11. Yet it is the least 'democratic' park in the country and the only one that doesn't have the benefit of parliamentary oversight...The time has come to give the park back to the people, Mr. Chairman." 

The National Interest Land Mass properties in 1988 - Ontario

• The Greenbelt - 14,000 ha or 34,594.753 acres. The Greenbelt was 45,000 acres in 1998. Google: "With no one allowed to watch and listen, members of the National Capital Commission ponder making deals with Nortel, battling El Nino and buying the Experimental Farm for $1 dollar." (Ottawa Citizen, August 24, 1998. The article was written by Tom Spears and the researcher was Ken Rubin.)
• Part of Lebreton Flats N. of Transitway - 65.37 ha or 161.53279 acres
• Agriculture Canada Experimental Farms on Carling Avenue and 1740 Woodroffe, the Greenbelt.
• Victoria Island - 6.35 ha
• Shoreline behind Parliament Hill - 2.91 ha
• Chambers Bldg. Elgin and Queen - 0.27
• Confederation Square - 0.15
• Pts of Wellington in front of Chateau Laurier and the Conference Centre and land to the E. of the Conference Centre. Also lands N. of Wellington between the Rideau Canal Lock & the Chateau Laurier & Major Hill Park. Also the approach to Alexandra Bridge & the new Art Gallery site.
• Lady Grey Drive and the Ottawa River W of Sussex Drive
• Daly Building, corner of Rideau & Sussex
• 8 parcels of land E of Sussex (Mile of History) from Rideau Street to MacDonald Cartier Bridge.
• Pt of the Mint property W of Sussex Drive. 

• Small park on W side of Sussex Drive S of MacDonald Cartier Bridge. Parking lot at Earnscliffe and water lot.
• 4 parcels on the Rideau River around City Hall
• 4 parcels E of Sussex Drive between Stanley Ave & Rideau Gate
• PM's residence
• Rideau Gate (Guest House)
• GG's residence (Rideau Hall)
• Ottawa River Parkway, Wellington Street to Carling Ave. (Plans may be underway to de pave the former Sir John A. Macdonald Parkway and several more federal highways including the Queen Elizabeth and Experimental Farm sites. Apparently the scenic parkways are "relics of the 20th century." If I lived elsewhere in Canada, I would be appalled by the fact that national assets are cavalierly given or sold to the City of Ottawa---the Mackenzie King Bridge ($1 dollar) and Laurier Avenue Bridge ($1 dollar); Wellington Street; government office buildings; CBC buildings; Prince of Wales Drive that runs through the Experimental Farm; Heron Road and Riverside Drive within Confederation Heights..).
• Champlain Bridge, Island Park Drive
• Rideau Canal lands from downtown to Hog's Back Road - 90 ha or 222 acres.
• Rideau River lands Green Island to Revelstoke Dr.
• Airport Parkway
• Eastern Parkway Hemlock Rd to Hwy 417
• Eastern Driveway and Rockcliffe Park from Sussex Drive to Greenbelt
• Lower Duck Island Ottawa River

NILM holdings in Quebec in 1988

• Gatineau Park - 32,000 ha or 79,073.722 acres
• 3 parcels-Ottawa River shoreline at Portage Bridge & land beside Eddy Street
• Parts of Laurier St in front of Place du Portage
• Ottawa River shoreline at the Alexandra Bridge approach   
• Hull wharf Ottawa River lot only
• Museum site Laurier Ave.
• Ottawa River shoreline S of Brewery Creek
• 8 parcels on the E side of Brewery Creek
• 4 parcels; Jacques Cartier Park
• Ottawa River shoreline proposed Voyageur Parkway
• Leamy Lake Park and part of the Philemon Wright Corridor. (Google: 1988-09-15-TB-re-NCC-Land Holdings)