Dawson stressed on Friday that her investigation would look at the Conflict of Interest act, not whether their conduct was questionable.
"We do have to find ourselves within the four corners of the Act and the code because it's not fair to the person being complained against just to not be aware what they were accused of," Dawson said Friday.
"Reputations are important so we take a fair bit of care to make sure we are not falsely concluding anything."
"It's important that people realize that maybe there is a lack there. Maybe it's not necessarily for this office to be looking after, but there should be some rules governing political behaviour."
"The Conservatives caused the Senate scandal, but they and the Liberals, NDP and Bloc Quebecois are all to blame for the weak, biased or ineffective lapdogs who are investigating the scandal," said Tyler Sommers, co-ordinator of Democracy Watch, in a statement earlier last week.
"Because they all failed during recent minority governments to choose strong watchdogs, and to pass measures to close loopholes and strengthen enforcement powers and requirements."