子虚已经证实了RC在这个问题中的有效性，那么我就就问题本身稍微做一点回答吧。首先搞清楚一点，caster level对于魔法物品来说是什么。
根据RC.p87所述：
Each item’s description indicates a caster level. This
caster level is used to determine the parameters of a
spell that the item duplicates, such as range, duration,
and so on. It’s also used to determine DCs for spells such
as dispel magic.
If an item doesn’t mention a caster level, assume the
caster level is equal to the minimum caster level required
for the highest-level spell given as a prerequisite for the
item. For an item that has only an enhancement bonus
and no other properties, the caster level is three times the
enhancement bonus.
从这里我们可以看出来，caster level对于魔法物品主要的影响就是它决定了物品与施法者等级相关的效果和被解除时的DC。那么，在制造魔法物品时我们是否需要达到其标识的caster level呢？
Caster Level
The next item in a notational entry gives the caster level of the item, indicating its relative power. The caster level determines the item’s saving throw bonus, as well as range or other level-dependent aspects of the powers of the item (if variable). It also determines the level that must be contended with should the item come under the effect of a dispel magic spell or similar situation. This information is given in the form "CL x," where "CL" is an abbreviation for caster level and "x" is an ordinal number representing the caster level itself.
For potions, scrolls, and wands, the creator can set the caster level of an item at any number high enough to cast the stored spell and not higher than her own caster level. For other magic items, the caster level is determined by the creator. The minimum caster level is that which is needed to meet the prerequisites given.
这是srd的说法。
在官网文章（Rules of the game部分）里，关于这方面的说明是：
When creating items, the creator's caster level must be at least as high as the item's caster level. Your caster level is your level in the class that gives you access to a particular spell needed for the item (see the section on prerequisites). In some cases, your caster level will be less than your class level; if so, the class description notes it. For example, a paladin's caster level is one-half her paladin level (a paladin of 3rd level or lower has no caster level at all).
