a list introduced with a colon

0Hi,02br
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00In Section D of Getitwrite's past tips section, under the heading of "Introducing a List," it is written as follows:02br
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00A vertical list should be introduced with either a colon or no punctuation at all, depending upon the structure of the lead-in: 02br
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001. A List Introduced with a Colon02br
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00A main clause (i.e., a group of words capable of standing alone as a sentence) must precede a colon in a sentence, no matter what follows that colon. In other words, use a colon to introduce a vertical list only if you could logically use a period at that place in a regular sentence.02br
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00It then gave these examples of opening phrases (note: see there are no colons): 02br
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001. During this meeting the members addressed such topic as02br
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002. Important developments have occurred in recent years in foreign language classrooms, where we find 02br
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003. In government and political science, learners are given opportunities to answer questions as02br
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00Are these examples look good to you? Is this fall into the category where it is a matter style? 0-