Latin epigraphy is in general much more standardized than Greek epigraphy, thanks largely to the efforts of Theodor Mommsen. All Latin inscriptions eventually find their way into the Corpus Inscriptionum Latinorum, although they are of course generally published independently first. There are also other handy publications, such as the Inscriptiones Latinae Selectae, that contain the same information in easier form. In Greek (as many Imperial pronouncements were issued to the Greek speaking world) there are the Inscriptiones Graecae, and the Supplementum Epigraphicum Graecum

None of these is particularly easy to browse through, and the CIL in particular is stupidly difficult to search online through the project's own page. For that the best place to go is the Epigrafik-Datenbank Clauss-Slaby (EDCS), and secondarily probably the Epigraphic Database Roma (EDR) or the Epigraphic Database Heidelberg, both of which tend to have better pictures and an easier search function. Inscriptions are a world of their own, and require a fair bit of practice before you can really use them fluently, but those are the basics.

What you want to do is go look up articles or books that discuss Tiberius' edicts. For example, a quick search of L'Année philologique shows a fair few articles on inscriptions relevant to Tiberius, although I'm not really sure precisely what you're looking for. Depending on whether you know what sort of epigraphical language you're looking for you can do a keyword search in the epigraphical databases (I recommend starting with EDH, which has an easy search function and will refer you to other databases that have pictures). But if you have no idea what you're looking for that won't help very much.

Oh man, I hope you've checked out "Princes and Political Cultures" by Greg Rowe, which is an entire analysis about recent(ish) discovered inscriptions from the Tiberian period regarding early imperial governance. If you mine the book, it may give you some avenues as for other inscriptions.

Aside from that, you might also want to consult "Roman Statutes" by Crawford, which I think has the most comprehensive set of pre-Theodosian Code Roman laws.

Hi - we as mods have approved this thread, because while this is a homework question, it is asking for clarification or resources, rather than the answer itself, which is fine according to our rules. This policy is further explained in this Rules Roundtable thread and this META Thread.

As a result, we'd also like to remind potential answerers to follow our rules on homework - please make sure that your answers focus appropriately on clarifications and detailing the resources that OP could be using.

Additionally, while users may be able to help you out with specifics relating to your question, we also have plenty of information on /r/AskHistorians on how to find and understand good sources in general. For instance, please check out our six-part series, "Finding and Understanding Sources", which has a wealth of information that may be useful for finding and understanding information for your essay.