for fun, i found a site 'straightrazorblah' something something. sorry forgot.
Here is a quote from there taken from wiki: (no idea of validity.
Originally Posted by
wikipedia
Some areas require barbers who provide straight-razor shaving to use a version that employs a disposable blade system. Still other jurisdictions ban the use of all straight razors and barbers use modern disposable blade razors instead.
In places such as Australia, New Zealand, Ontario, Pennsylvania, Denver, Boston, Texas and San Diego, however, the use of straight razors is legal.
it seems more an issue of blood borne pathegons and you have to use a disposable one.