alphagov/trade-tariff-backend — pull request #129 by sauliusg (2013-11-22 15:02:47+00:00)
Title: Expose validity periods for goods nomenclature changes

This change is for https://www.pivotaltracker.com/story/show/61287082

See here for more information https://github.com/alphagov/trade-tariff-frontend/pull/99