Should I add punctuation after each in a a list of incomplete sentences?

Question

When writing a list of potentially incomplete sentences, how should I punctuate each item?

Daycare Admission Rules:

1. No older than 5 years
2. No younger than 1 year
3. No purple Hair

Do I end each with a period, a question mark (if interrogative), or nothing?

Answer 1

No. Your example is factual and not fiction:

Sentences Left Incomplete

The fact that a sentence has been broken off, the remainder being left to the reader's imagination, is commonly marked by a double dash or suspension dots. This usage is infrequent in factual writing, though not uncommon in fiction. —American punctuation by Summey, George

Also:

Punctuating Bullet Points

In business writing courses, the most common question about punctuation involves how to punctuate bullet points. It's important, since these days we write as many bullet points as paragraphs.

Let me tell you how I punctuate them, and then I will touch on other ways recommended by prestigious style manuals.

Here is what I recommend:

• Use a period (full stop) after every bullet point that is a sentence (as these bullets do).
• Use a period after every bullet point that completes the introductory stem.
• Use no punctuation after bullets that are not sentences and do not complete the stem.
• Use all sentences or all fragments, not a mixture.

• See more at: Business Writing Blog

Answer 2

You don't need punctuation at the end of a bullet point if the bullet points themselves are sentence fragments, rather than full sentences.

The problem is, the first two entries in your examples are not grammatically appropriate sentence fragments. If you put up a sign saying "No older than 5 years," the punctuation is not going to be what makes people see the sign as ungrammatical. You need to rephrase that somehow: "No children over five" or "Children 4 and younger only" or even, at a pinch, "4 and under only".

Also, do not capitalize "Hair."