The typical bill consists of language such as:
“Section 32c of U.S.C 5.3842.15 is hereby amended by: deleting pragraph 4, section 7, Title 3 and subsituting the following “and other such items as may fall under the jurisdicion of P.L. 105.376 as enacted.”
This can go on for 300 pages.
Most legislators read the summary, not because they are lazy but because it is actually understandable.