For what its worth, the relationship between cities and their state is very different than the relationship between the states and the federal government. There has historically been a concept referred to as dual-federalism which has evolved into cooperative federalism to describe this relationship. This is in contrast to the creation of cities and towns, which are entirely creatures of the state governments.
That said, I do agree the regulation of DST definitely falls under the weights and measures clause. We can't have Shelbyville continue to operate on metric time, we here in Springfield gave up on that years ago. One might even be able to successfully argue an interstate commerce argument on standardizations of timekeeping.
That said, I do agree the regulation of DST definitely falls under the weights and measures clause. We can't have Shelbyville continue to operate on metric time, we here in Springfield gave up on that years ago. One might even be able to successfully argue an interstate commerce argument on standardizations of timekeeping.