gistfile1.txt

// Tag A

<script>
    ! function(f, b, e, v, n, t, s) {
        if (f.fbq) return;
        n = f.fbq = function() {
            n.callMethod ? n.callMethod.apply(n, arguments) : n.queue.push(arguments)
        };
        if (!f._fbq) f._fbq = n;
        n.push = n;
        n.loaded = !0;
        n.version = '2.0';
        n.queue = [];
        t = b.createElement(e);
        t.async = !0;
        t.src = v;
        s = b.getElementsByTagName(e)[0];
        s.parentNode.insertBefore(t, s)
    }(window, document, 'script', '//connect.facebook.net/en_US/fbevents.js');
    
    fbq('init', '1105554909476555');
    

// Tag B
// Sequencing -> Fire a Tag Before -> (Tag A)
<script>
    fbq('track', "PageView");
</script>
<noscript>
    <img height="1" width="1" style="display:none"
src="https://www.facebook.com/tr?id=1105554909476555&ev=PageView&noscript=1"
/>
</noscript>

// Tag C
// Sequencing -> Fire a Tag Before -> (Tag A)
<script>
fbq('track', 'ViewContent');
</script>

// Tag D
// Sequencing -> Fire a Tag Before -> (Tag A)
<script>
fbq('track', 'Search');
</script>

// Tag E
// Sequencing -> Fire a Tag Before -> (Tag A)
<script>
fbq('track', 'CompleteRegistration');
</script>

Under this scenario, fbq('init', '1105554909476555'); will be called multiple times. Not sure if this will be handled elegantly behind the scenes by Facebook or it will freak out..