In the IIS7 URL Rewrite module, can I specify in a redirect rule to not apply to http-post requests

In IIS7 URL Rewrite module, can I specify in a redirect rule to not apply to http-post requests? I am using the templates provided by Microsoft to lowercase all urls and to append a trailing slash. However I have a AJAX post requests that don't meet this specification but they break we they are rewritten as 301s. I am not worried about POST requests for SEO so I would prefer if I could just specify in the rule to ignore it. Below are my rules:

            <rule name="AddTrailingSlashRule" stopProcessing="true">
                <match url="(.*[^/])$" />
                <conditions>
                    <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                </conditions>
                <action type="Redirect" url="{R:1}/" />
            </rule>
            <rule name="LowerCaseRule" stopProcessing="true">
                <match url="[A-Z]" ignoreCase="false" />
                <action type="Redirect" url="{ToLower:{URL}}" />
            </rule>