Scrolls and metamagic

[trehek]

Some relevant facts:

-PHB, page 141, "Read a Scroll" is listed as a standard action that provokes AoO.

-PHB, page 142, activating a spell completion item (including scrolls)

-DMG, page 238, activation and effect of a scroll

-DMG, page 236, metamagic rods

EDIT: Pages listed are from 3.5

Based on these facts, is it possible to apply a metamagic effect on a spell that is being cast from a scroll, using a metamagic rod or a sudden metamagic feat?

[Shhalahr Windrider]

No. Metamagic rods are activated by casting a spell. While using a spell completion item such as a scroll is similar to actually casting a spell, it is a subset of the "Activate a Magic Item" action (see the Actions in Combat:Activate a Magic Item).