Per standards set by the State of Oregon,

A student admitted to undergraduate degree study for the first time shall have either a standard high school diploma, a comparable credential issued outside the United States, or a GED. Home-schooled students without a standard diploma or GED may only be admitted if they can demonstrate the ability to perform college-level academic work through use of an ability-to-benefit test. Modified diplomas, extended diplomas and other kinds of K-12 leaver certificates are not considered diplomas for purposes of college admissions. Students holding such nonstandard certificates can be admitted only through use of an ability-to-benefit test (OAR 583-03-0035 9.a).