You can find it here. From the press release:

Washington – Broad principles to reform congressional and legislative redistricting were announced today by a range of groups and individuals who are advocating the use of independent commissions to create competitive districts.
The principles were drafted by a group of experts with diverse backgrounds and political affiliations at a redistricting reform conference held last June in Airlie, Virginia. They are part of a report entitled The Shape of Representative Democracy and lay out an integrated approach that addresses both procedures for redistricting and standards for redistricting.
The procedural principles include: assigning the job of redistricting to an independent commission; ensuring transparency and a meaningful opportunity for interested parties and the public to participate effectively; and limiting redistricting to once a decade, following each census.
The recommended substantive standards for redistricting are: adhering to all constitutional and Voting Rights Act requirements; promoting competitiveness and partisan fairness; respecting political subdivisions and communities of interest; and encouraging geographical compactness.