It has taken environmental and industry lawyers a week to work their way through the complex fisheries provisions in the new omnibus budget bill.
They say the most puzzling thing is the inclusion of two different ways in which protection of fish habitat will change.
"This is just weird," said Andrew Gage, a staff lawyer with West Coast Environmental Law.
One provision will come into effect as soon as the bill is passed. It maintains some protection of fish habitat, but it gives Ottawa more leeway to allow exceptions.
The second phase will come later — exactly when is unknown — and will allow industrial development as long as fish deemed important for commercial or aboriginal use or for a sports fishery, aren't actually killed.
"This is the real new replacement," said Green Party Leader Elizabeth May, who has spent hours dissecting the measures.
For wildlife and the country's ecosystems, "it's devastating and sweeping," she said.
After hashing through the details with Fisheries officials, May believes the legislation will eventually eliminate protection of fish habitat, hand more oversight to provincial regulators and remove all federal impediments to natural resource extraction.
Why the rarely used, two-step approach? Because the government wanted to implement change soon, but needed extra time to develop a full-fledged set of regulations, officials say.
"Time will be required to develop supporting policies, procedures and regulations to implement this new prohibition," Fisheries spokesman Frank Stanek said in an email, adding that Ottawa will consult provinces, aboriginal groups, industry and conservation organizations.
He did not immediately answer questions about why the current regime could not be kept in place until the new one is ready.
The fisheries changes are woven throughout the budget implementation bill, and are so scattered that lawyers and experts are still scratching their heads even after a briefing from departmental officials.
The Assembly of First Nations, instead of responding directly to the changes in the Fisheries Act, published a list of 16 questions of its own about how the legislation will work.
The organization says it needs to know timelines, definitions of terms used in the legislation, plans for consultation and basic information about protection of aboriginal fishing rights.
The Mining Association of Canada would not comment on the bill until its lawyers thoroughly understand it.
Now, if companies want to mine or drill or run a pipeline, they must ensure they don't disrupt fish habitat and if they do, they must provide a new habitat for the fish.
Under the new provisions, habitat is not the main concern. They look at the fish themselves.
According to the wording in the budget bill, the government will only stop development if "serious harm" to fish is at stake, and only if those fish are part of a commercial, recreational or aboriginal fishery.
"Serious harm" is defined as death, or permanent damage to habitat.
As Gage points out, it does not include maiming, stunting or distorting the growth of fish. Proving a company has directly caused the death of important fish is very difficult, he added.
Federal ministers say they need the new rules because too much development is held up by legislation that protects ditches, puddles and minor streams.
They say the new provisions will also include stiffer penalties for companies that don't fall into line.
"These proposed changes to the Fisheries Act shift the department of Fisheries and Oceans’ from managing all impacts on all fish and all habitat to focusing on protect Canada’s fisheries and the habitat that supports them," Minister Keith Ashfield told the House of Commons on Thursday.
Officials said the new regulations would continue to protect fish habitat, but that the new rules would get rid of the confusion surrounding the old rules.
They added that they hope to see the second version of the changes come into law six months after the budget bill passes.