2.1.1369 Part 4 Section 126.96.36.199, blur (Blur Effect)
a. The standard states that if attribute grow is true, blur may extend beyond object bounds.
In Office, if blur is applied to blip in a blipFill, fill constraints will keep the blur from extending beyond object bounds.
b. The standard states that attribute rad will specify radius of blur.
Office interprets the radius of blur as destination pixels, rather than source pixels. For other effect contexts, it is device independent.