Just in case you missed it, here is the government's clarification on plastic bags ban: The ban issued by Cabinet Secretary for Environment and Natural Resources Prof Judi Wakhungu on the use, manufacture and importation of all plastic bags with effect from August 28, 2017, is in force.
The ban applies to, one, carrier bags with handles and with or without gussets and two, flat bags without handles and with or without gussets.