Hey there was some confusion in some of the other threads over why certain players do or do not have to clear re-entry waivers.  So I looked it up to figure out why, since there was a claim thrown out there that Jeff Tambellini didn't need to if we were to call him back up.  And the answer is it has nothing to do with the type of contract. 

Basically, everyone who must clear waivers to be sent down to the minors must also clear re-entry waivers to be recalled, unless they fall under an exception that allows players with a lot of professional experience, but limited NHL experience over the past one or two seasons, to be exempt from this process.  Here is the exception, as found towards the end of Section 50.9(g):

The Re-Entry Waiver procedure will not, however, be applicable to
Veteran Minor League Players defined as follows: (i) for goaltenders, Players who
have: (A) played in 180 or more professional games in North America (NHL, AHL
and ECHL), and (B) not spent more than 80 NHL games on NHL roster over the
prior two (2) seasons or more than 40 NHL games on NHL roster in the
immediately prior season; and (ii) for defensemen and forwards, Players who have:
(A) played in 320 or more professional games in North America (NHL, AHL and
ECHL), and (B) not spent more than 80 NHL games on NHL roster over the prior
two (2) seasons or more than 40 NHL games on NHL roster in the immediately
prior season.

NHL games missed due to a Player being on Injured Reserve or Injured
Non-Roster count for purposes of determining whether a Player has surpassed the
80 or 40 NHL game thresholds, respectively.

So where does it leave the Canucks? Well, basically Tambellini and Joel Perrault fit this description, since Tambo has played 356 AHL/NHL games but only played 36 games in the NHL last season.  Perrault has played 398 ECHL/AHL/NHL games, but only 2 games in the NHL last year.  To the best of my knowledge (and I looked for it on Google), neither player was on the IR with their NHL squad last year.  Therefore, they both meet the above exception, and though they must pass waivers to go down, they don't need to clear re-entry waivers on the way up.