It is fairly common for an album which received the Parental Advisory seal to be sold alongside an "edited" version which removes objectionable content, usually to the same level as a radio edit. However, the RIAA Uniform Guidelines say "An Edited Version need not remove all potentially objectionable content from the sound recording." These albums are packaged nearly-identically to their explicit counterparts, usually with the only indicator being the lack of Parental Advisory seal, although if the artwork is explicit too, it will normally be censored (an example being "Rainbow" by Kesha where on the edited version, the body is moved lower so the buttocks are not visible). In the case of some albums such as "Box Car Racer", a black box reading "EDITED VERSION" is placed where the Parental Advisory seal would be. This was part of new guidelines introduced on April 1, 2002, which also included a label that featured "Edited Version Also Available" next to the Parental Advisory seal. Sometimes, an artist will deliberately change the title or artwork of an edited version as to reflect the censorship. For example, as well as removing the marijuana leaf, the cover of the edited version of Dr Dre's 1999 album "2001" has a big box reading "CENSORED VERSION" while the edited version of 2 Live Crew's 1989 album "As Nasty As They Wanna Be" not only changed the title to "As Clean As They Wanna Be", but also censors part of the cover photograph with a blue bar that has a disclaimer that reads "THIS ALBUM DOES NOT CONTAIN EXPLICIT LYRICS". Tool's debut release Undertow features a giant barcode and a note from the band criticizing Walmart.