I am asking about the legal issues with: When to pay a 1099 worker? Is it on the companies payroll policy or whenever the 1099 worker wants money?
I have no idea what any company's payroll policy might be.
A person working under a 1099 isn't an employee.
If he or she isn't an employee, they aren't paid like an employee.
They are paid like a supplier, vendor, BUT not an employee.
Texas law doesn't concern itself with HOW a company pays its suppliers.
If this puzzles you, I suggest you ask your competitors HOW they pay their contractors.
A person working under a 1099 submits an invoice for XX hours worked, at XXX dollars an hour for a total amount claimed.
the invoice is audited, and normally paid after such audit.
Most companies have, as you suggest a written policy addressing this process.
Again, how, or if you pay contractors is of NO concern to the law.
If you buy bricks or lumber from a supplier, you pay off of the invoice the supplier provides you.
The same process applies to those you have working as contractors under a 1099 scheme.
People working under a 1099 are NOT employees, they are vendors, suppliers, or contractors.