Whenever the Runner accesses cards, trashing cards that have trash costs is one of the interactions s/he can make.
|Page 18, Column 2, Paragraph(s) 2, Core Rule Book
|If the Runner accesses a card with a trash cost, he may pay credits equal to its trash cost in order to trash it to Archives faceup.
"Normally be Trashed"Edit
When a card ability allows the Runner to trash a card that cannot normally be trashed, this refers specifically to cards that do not have trash costs.
|Page 3, Column 1, Paragraph(s) 1, FAQ
|Trashing cards that "cannot normally be trashed" only refers to trashing cards that do not have a trash cost.