[QUOTE=DrDeth]
Like I said- there are no rules of grammar other than: having it be an established usage, and be readily understandable. In the case of “There am no rule-making body.” it could be argued, as you said, to be understandable, but it’s not a standard usage.
For example, the “serial comma”; once we have placed- or not placed- a comma to ensure proper understanding, either usage is standard, thus either usage is correct. True, the Chicago Manual of Style says one usage is right and the other isn’t, but other Manuals of style disagree.
Therby there are no “rules”. There are “usages”, and a need for the wording to be understandable. If one wishes to end a sentence with a preposition (a big “hobgoblin” to some Grammar Police), then despite what a “manual of style” may or may not “rule”- it’s OK to do so, as long as the meaning is clear.
Oxford, for example- lists usages. They don’t try to “rule” whether one usage is “right” and another is “wrong” they simply cover such usages as are standard. It’s called “descriptive” or “descriptivism”. Making "rules’ is “prescriptivism”.
In France, they have an actual Body of National law on what words, grammar and such like are “legal”. :rolleyes: That’s the ultimate example of “prescriptivism”. We have nothing like that in the USA (thank gawd) and in fact, there are usually several disagreements between such “style manuals”. In fact, there’s nothing to stop dudes from coming out with rather strange “Manuals”- which has happened, like with some simplified spelling ideas. (some of which were great, and others- not so much.)
Descriptivism is in. Presciptivism is out. Sorry.
Trying to be Presciptive with the English language is like Canute and the Tides. 
[/QUOTE]
Th’art soothly spoke, O misspelt death-wight, whilst thou saist that the English, she hath no prescriptivism. But when thou hiest thence to the proposition that there be no rules, thou couldst not be farther erring. There being usages the which comprise consensus custom as to how the language, she is spake, the christening thereof as “rules,” the which describe usage, is not wrongly uttered.
Or, in simpler terms, English has “rules” that describe how various subcultures within the English speaking world use the language in various contexts, ranging from formal scientific or scholarly papers to the conversation of teens whose 'rents may be listening. Just as it’s completely improper in both formal and colloquial Spanish to use the passive (except in very strained contexts) to identify what an inanimate object is termed, but instead, by an idiomatic construction, the reflexive is used, producing sentences that translate to “This mineral calls itself hornblende.” A childless Russian will not say “I have no children” but “By me there is nothing of child.” The literal translations of the normal English sentences “This rock is called hornblende” and “I have no children” are wrong – not because the Imperial Spanish and Russian People’s Language Authorities declared them so, but because they do not correctly apply the proper grammatical and syntactic structures of Spanish and Russian. And “You am wrong to saying English have no rules” is a similarly grammatically incorrect sentence – though true in its meaning, because it itself violates the consensus “rules” that English speakers normally use.