In section 14.4.2 replace the following paragraph:

When the same output signal in a clocking-domain is driven more than once at the same time, the drives are checked for conflicts. When conflicting drives are detected, a runtime error is issued, and each conflicting bit is driven to X (or 0 for a 2-state port).

with:

When more than one synchronous drive is applied to the same clocking domain output (or inout) at the same simulation time, the driven values are checked for conflicts. When conflicting drives are detected a runtime error is issued, and each conflicting bit is driven to X (or 0 for a 2-state port).