If the antecedent consists of a group of words, the relative comes at the end of the group, unless this would cause ambiguity.

The Superintendent of the Chicago Division, who

A proposal to amend the Sherman Act, which has been variously judged.A proposal, which has been variously judged, to amend the Sherman Act.
A proposal to amend the much-debated Sherman Act.
The grandson of William Henry Harrison, whoWilliam Henry Harrison's grandson, who

A noun in apposition may come between antecedent and relative, because in such a combination no real ambiguity can arise.

The Duke of York, his brother, who was regarded with hostility by the Whigs

Modifiers should come, if possible, next to the word they modify. If several expressions modify the same word, they should be so arranged that no wrong relation is suggested.

All the members were not present.Not all the members were present.
He only found two mistakes.He found only two mistakes.
Major R. E. Joyce will give a lecture on Tuesday evening in Bailey Hall, to which the public is invited, on “My Experiences in Mesopotamia” at eight P. M.On Tuesday evening at eight P. M., Major R. E. Joyce will give in Bailey Hall a lecture on “My Experiences in Mesopotamia.” The public is invited.

[17.] In summaries, keep to one tense.

In summarizing the action of a drama, the writer should always use the present tense. In summarizing a poem, story, or novel, he should preferably use the present, though he may use the past if he prefers. If the summary is in the present tense, antecedent action should be expressed by the perfect; if in the past, by the past perfect.

An unforeseen chance prevents Friar John from delivering Friar Lawrence's letter to Romeo. Meanwhile, owing to her father's arbitrary change of the day set for her wedding, Juliet has been compelled to drink the potion on Tuesday night, with the result that Balthasar informs Romeo of her supposed death before Friar Lawrence learns of the non-delivery of the letter.