To simplify the expression \( 12^{53} \div 7^{53} \) using the Quotient Rule of integer exponents, we apply the rule which states that:
\[ \frac{a^m}{b^m} = \left(\frac{a}{b}\right)^m \]
In our case, we can express the original problem as:
\[ \frac{12^{53}}{7^{53}} = \left( \frac{12}{7} \right)^{53} \]
Therefore, the simplified expression is:
\[ \left( \frac{12}{7} \right)^{53} \]